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Potassic-arfvedsonite

A valid IMA mineral species
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00175050017271948825712.jpg
Potassic-arfvedsonite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
01914750017271948835210.jpg
Potassic-arfvedsonite, etc.

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
08496090017271948831429.jpg
Potassic-arfvedsonite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
00175050017271948825712.jpg
Potassic-arfvedsonite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
01914750017271948835210.jpg
Potassic-arfvedsonite, etc.

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
08496090017271948831429.jpg
Potassic-arfvedsonite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
05525820017271948849065.jpg
Potassic-arfvedsonite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
01914750017271948835210.jpg
Potassic-arfvedsonite, etc.

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
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About Potassic-arfvedsoniteHide

02881810017271921198403.jpg
Johan August Arfwedson
Formula:
KNa2(Fe2+4Fe3+)(Si8O22)(OH)2
The arfvedsonite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu with Fe as the dominant element in the C3+ position.

Potassic-arfvedsonite is defined with

A position: K dominant
C2+ position: Fe dominant
C3+ position: Fe dominant
W position: (OH) dominant
Colour:
Black or dark blue-green
Lustre:
Vitreous
Hardness:
5½ - 6
Specific Gravity:
3.39
Crystal System:
Monoclinic
Name:
The mineral was named as the potassium-dominant analogue of arfvedsonite.
This page provides mineralogical data about Potassic-arfvedsonite.


Unique IdentifiersHide

Mindat ID:
27528
Long-form identifier:
mindat:1:1:27528:4

IMA Classification of Potassic-arfvedsoniteHide

IMA status:
Approved
IMA Formula:
KNa2Fe2+4Fe3+Si8O22(OH)2
Approval year:
2003
First published:
2004

Classification of Potassic-arfvedsoniteHide

Strunz-mindat (2026):
9.DE.25

9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
ParfIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Potassic-arfvedsoniteHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
Black or dark blue-green
Streak:
Pale blue
Hardness:
5½ - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect {110}.
Fracture:
Splintery, Step-Like
Density:
3.39(2) g/cm3 (Measured)    3.43 g/cm3 (Calculated)

Optical Data of Potassic-arfvedsoniteHide

Type:
Biaxial (-)
RI values:
nα = 1.683(2) nβ = 1.692(2) nγ = 1.699(2)
2V:
Measured: >60° , Calculated: 82°
Max. Birefringence:
δ = 0.016
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
Strong, r > v.
Optical Extinction:
Z = b, X ∧ c = 20(10)°, Y ∧ a = 30(10)°.
Pleochroism:
Strong
Comments:
X = dark blue-green, Y = gray-green, Z = pale green-gray to pale green-brown.
Comments:
Absorption: X ≥ Y > Z.

Chemistry of Potassic-arfvedsoniteHide

Mindat Formula:
KNa2(Fe2+4Fe3+)(Si8O22)(OH)2

The arfvedsonite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu with Fe as the dominant element in the C3+ position.

Potassic-arfvedsonite is defined with

A position: K dominant
C2+ position: Fe dominant
C3+ position: Fe dominant
W position: (OH) dominant
Element Weights:
Element% weight
O39.384 %
Fe28.639 %
Si23.045 %
Na4.716 %
K4.010 %
H0.207 %

Calculated from ideal end-member formula.
O
Fe
Si
Na
K
H
Elements listed:
Fe, H, K, Na, O, Si - search for minerals with similar chemistry

Chemical AnalysisHide

Oxide wt%:
 1234
SiO249.48 %48.63 %52.82 %51.64 %
TiO20.47 %0.43 %0.77 %0.74 %
Al2O30.89 %0.58 %0.51 %0.58 %
Fe2O32.26 %11.60 %8.50 %4.74 %
FeO31.58 %24.69 %13.82 %17.53 %
MnO2.04 %1.37 %3.26 %0.88 %
MgO0.70 %0.04 %4.8 %7.79 %
CaO1.02 %0.30 %0.09 %1.63 %
Na2O6.93 %7.01 %7.65 %6.94 %
K2O1.97 %3.29 %3.76 %3.41 %
ZnO0.20 %0.11 %0.06 %
F0.36 %1.21 %1.59 %
Li2O0.45 %0.73 %
H2O1.7 %1.38 %1.20 %
O=F-0.15 %-0.51 %-0.67 %
Total:97.34 %100.5 %98.9 %98.06 %
Empirical formulas:
Sample IDEmpirical Formula
2(K0.67Na0.22) 0.89(Na1.95Ca0.05) 2.00 (Fe2+ 3.29Fe3+ 1.26Li0.29Mn0.19Ti0.05Zn0.02Mg0.01) 5.11(Si7.76Fe3+ 0.13Al0.11) 8.00 O22[(OH) 1.81F0.18] 1.99
3(K0.73Na0.27) 1.00 (Na2.00Ca0.01) 2.01 (Fe2+ 1.77 Mg1.10Fe3+ 0.98Li0.45Mn0.42Ti0.09Zn0.01 Al0.09) 4.91Si8.09O22[(OH) 1.41F0.59] 2.00
4(K0.67Na0.33) 1.00 (Na1.74Ca0.27) 2.01 (Fe2+ 2.26 Mg1.79Fe3+ 0.55Mn0.25Ti0.09Zn0.01 Al0.05) 5.00(Si7.94 Al0.06) 8.00O22[(OH) 1.23F0.77] 2.00
Sample references:
IDTypeLocalityReferenceNotes
1Motzfeldt Centre, Igaliku Complex, Kujalleq, Greenland
Bradshaw, C. (1988). A petrographic structural and geochemical study of the alkaline igneous rocks of the Motzfeldt Centre South Greenland. Doctoral dissertation, Durham University.
Sample from an alkali-rich syenite.
2Type SpecimenPotassic-Arfvedsonite occurrence, Pegmatite Valley, Lilleelv, Head of Kangerluarsuk, Kangerluarsuk Fjord, Ilímaussaq complex, Kujalleq, Greenland
Pekov, I.V., Chukanov, N.V., Lebedeva, Yu. S., Pushcharovsky, D. Yu., Ferraris, G., Gula, A., Zadov, A.E., Novakova, A.A., Petersen, O.V. (2004) Potassicarfvedsonite, KNa2 Fe2+4Fe3+Si8O22(OH)2, a K-dominant amphibole of the arfvedsonite series from agpaitic pegmatites – Mineral data, structure refinement and disorder in the A site. Neues Jahrbuch für Mineralogie - Monatshefte, 2004 (12) 555-574 doi:10.1127/0028-3649/2004/2004-0555
The chemical composition of potassicarfvedsonite was obtained (fluorine and cations except Li) by a Camebax SX50 electron microprobe. Li was determined by atom emission using a Carl Zeiss AAS30 spectrophotometer. The water content was determined by the Alimarin method, a modified Penfield, with water absorption by Mg(ClO4)2. The Fe2+/ Fe3+ ratio was determined via Mössbauer spectroscopy. Single-crystal diffraction data were collected at room temperature using a Nonius Kappa CCD diffractometer. X-ray powder diffraction data were obtained using a DRON UM-1 diffractometer and Fe-filtered CoKα-radiation
3Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
Pekov, I.V., Chukanov, N.V., Lebedeva, Yu. S., Pushcharovsky, D. Yu., Ferraris, G., Gula, A., Zadov, A.E., Novakova, A.A., Petersen, O.V. (2004) Potassicarfvedsonite, KNa2 Fe2+4Fe3+Si8O22(OH)2, a K-dominant amphibole of the arfvedsonite series from agpaitic pegmatites – Mineral data, structure refinement and disorder in the A site. Neues Jahrbuch für Mineralogie - Monatshefte, 2004 (12) 555-574 doi:10.1127/0028-3649/2004/2004-0555
The chemical composition of potassicarfvedsonite was obtained (fluorine and cations except Li) by a Camebax SX50 electron microprobe. Li was determined by atom emission using a Carl Zeiss AAS30 spectrophotometer. The water content calculated The Fe2+/ Fe3+ ratio was calculated.
4Hilairitovoye pegmatite, 252 m level, Kirovskii apatite mine, Kukisvumchorr Mt, Murmansk Oblast, Russia
Pekov, I.V., Chukanov, N.V., Lebedeva, Yu. S., Pushcharovsky, D. Yu., Ferraris, G., Gula, A., Zadov, A.E., Novakova, A.A., Petersen, O.V. (2004) Potassicarfvedsonite, KNa2 Fe2+4Fe3+Si8O22(OH)2, a K-dominant amphibole of the arfvedsonite series from agpaitic pegmatites – Mineral data, structure refinement and disorder in the A site. Neues Jahrbuch für Mineralogie - Monatshefte, 2004 (12) 555-574 doi:10.1127/0028-3649/2004/2004-0555
The chemical composition of potassicarfvedsonite was obtained (fluorine and cations except Li) by a Camebax SX50 electron microprobe. Li was determined by atom emission using a Carl Zeiss AAS30 spectrophotometer. The water content calculated The Fe2+/ Fe3+ ratio was calculated.

Crystallography of Potassic-arfvedsoniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 10.002(2) Å, b = 18.054(3) Å, c = 5.319(1) Å
β = 103.9(3)°
Ratio:
a:b:c = 0.554 : 1 : 0.295
Unit Cell V:
932.36 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.02 Å(28)
8.53 Å(100)
3.419 Å(12)
3.303 Å(23)
3.184 Å(40)
2.847 Å(17)
2.725 Å(10)
Locality:
Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
Comments:
From type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3b: Earth’s earliest hydrosphere>4.45
17 : Marine authigenic Hadean minerals (see also #24)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks
36 : Carbonatites, kimberlites, and related igneous rocks

Type Occurrence of Potassic-arfvedsoniteHide

Co-Type Localities:
ⓘ Potassic-Arfvedsonite occurrence, Pegmatite Valley, Lilleelv, Head of Kangerluarsuk, Kangerluarsuk Fjord, Ilímaussaq complex, Kujalleq, Greenland
ⓘ Hilairitovoye pegmatite, 252 m level, Kirovskii apatite mine, Kukisvumchorr Mt, Murmansk Oblast, Russia
ⓘ Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
Euhedral, prismatic to acicular crystals from a few centimeters to 15 x 0.8 cm.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, no. 3137/1 (Greenland) and 3137/2 (Lovozero).
Empirical Formula of Type Material:
(K0.67Na0.22) 0.89(Na1.95Ca0.05) 2.00 (Fe2+ 3.29Fe3+ 1.26Li0.29Mn0.19Ti0.05Zn0.02Mg0.01) 5.11(Si7.76Fe3+ 0.13Al0.11) 8.00 O22[(OH) 1.81F0.18] 1.99
Geological Setting of Type Material:
Agpaitic complexes.
Associated Minerals at Type Locality:
AegirineAnalcimeArfvedsoniteEpistoliteEudialyte
FluorapatiteFluoriteLamprophylliteLomonosoviteLorenzenite
MicroclineNatroliteNephelineRinkite-(Ce)Sodalite
SphaleriteSteenstrupine-(Ce)TitaniteVilliaumite

Synonyms of Potassic-arfvedsoniteHide

Other Language Names for Potassic-arfvedsoniteHide

Relationship of Potassic-arfvedsonite to other SpeciesHide

Member of:
Arfvedsonite Root Name Group > Sodium Amphibole Subgroup > w(OH,F,Cl)-dominant Amphibole Group > Amphibole Supergroup
Other Members of Arfvedsonite Root Name Group:
ArfvedsoniteNaNa2(Fe2+4Fe3+)Si8O22(OH)2Mon. 2/m : B2/m
'Fluoro-arfvedsonite'NaNa2(Fe2+4Fe3+)Si8O22F2
Magnesio-arfvedsoniteNaNa2(Mg4Fe3+)(Si8O22)(OH)2Mon. 2/m : B2/m
Magnesio-fluoro-arfvedsoniteNaNa2(Mg4Fe3+)[Si8O22]F2Mon. 2/m : B2/m
Potassic-magnesio-arfvedsoniteKNa2(Mg4Fe3+)(Si8O22)(OH)2Mon. 2/m : B2/m
Potassic-magnesio-fluoro-arfvedsoniteKNa2(Mg4Fe3+)(Si8O22)F2Mon. 2/m : B2/m

Common AssociatesHide

Associations Based on Photo Data:
3 photos of Potassic-arfvedsonite associated with ManaksiteKNaMnSi4O10
2 photos of Potassic-arfvedsonite associated with UssingiteNa2AlSi3O8OH
1 photo of Potassic-arfvedsonite associated with VilliaumiteNaF
1 photo of Potassic-arfvedsonite associated with NatrosiliteNa2Si2O5
1 photo of Potassic-arfvedsonite associated with SphaleriteZnS
1 photo of Potassic-arfvedsonite associated with MicroclineK(AlSi3O8)
1 photo of Potassic-arfvedsonite associated with SodaliteNa4(Si3Al3)O12Cl

Related Minerals - Strunz-mindat GroupingHide

9.DE.ShojiiteNa(NaMg)Mg5Si8O22(OH)2Mon. 2/m : B2/m
9.DE.Clino-suenoite◻Mn2+2(Mg5)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.Mangani-eckermanniteNaNa2(Mg4Mn3+)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.05'Permanganogrunerite'◻{Mn2+2}{Mn2+5}(Si8O22)(OH)2Mon.
9.DE.05Cummingtonite◻Mg2Mg5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Ferri-fluoro-leakeiteNaNa2(Mg2Fe3+2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.05Grunerite◻Fe2+2Fe2+5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Clino-holmquistite Root Name Group◻Li2(C2+3C3+2)(Si8O22)w2Mon.
9.DE.10Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.10Fluoro-cannilloiteCaCa2(Mg4Al)(Si5Al3)O22F2Mon. 2/m : B2/m
9.DE.10JoesmithitePb2+Ca2(Mg3Fe3+2)(Si6Be2)O22(OH)2Mon. 2/m : P2/b
9.DE.10Clino-ferro-suenoite◻Mn2+2(Fe2+5)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Fluoro-tremolite◻Ca2Mg5(Si8O22)F2Mon. 2/m : B2/m
9.DE.10'Parvo-manganotremolite'◻{CaMn2+}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Magnesio-ferri-hornblende◻Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2Mon. 2/m : B2/m
9.DE.10Ferro-ferri-hornblende◻Ca2(Fe2+4Fe3+)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.10'Ferro-cannilloite'CaCa2(Fe2+4Al)(Si5Al3O22)OH2
9.DE.10'Ferro-ferri-cannilloite'CaCa2(Fe2+4Fe3+)(Si5Al3O22)OH2
9.DE.10'Ferro-fluoro-actinolite'◻{Ca2}{Fe5}(Si8O22)F2
9.DE.10'Ferro-fluoro-hornblende'◻Ca2(Fe2+4Al)(AlSi7O22)F2
9.DE.10Magnesio-ferri-fluoro-hornblende◻Ca2(Mg4Fe3+)(AlSi7O22)F2Mon. 2/m : B2/m
9.DE.10'Ferro-ferri-fluoro-hornblende'◻Ca2(Fe2+4Fe3+)(AlSi7O22)F2
9.DE.10'Ferri-fluoro-tschermakite'◻{Ca2}{Mg3Fe3+2}(Al2Si6O22)F2
9.DE.10'Ferro-ferri-fluoro-tschermakite'◻{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)F2
9.DE.10'Ferro-fluoro-tschermakite'◻{Ca2}{Fe2+3Al2}(Al2Si6O22)F2
9.DE.10'Fluoro-tschermakite'◻{Ca2}{Mg3Al2}(Al2Si6O22)F2
9.DE.10'Magnesio-fluoro-hornblende'◻Ca2(Mg4Al)(AlSi7O22)F2
9.DE.10Tremolite◻Ca2Mg5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10'Ferro-ferri-tschermakite'◻{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)(OH)2Mon.
9.DE.10'Cannilloite'CaCa2(Mg4Al)(Si5Al3O22)OH2Mon.
9.DE.10Tschermakite◻Ca2(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.10'Ferri-tschermakite'◻Ca2(Mg3Fe3+2)(Al2Si6O22)(OH)2Mon.
9.DE.10Ferro-actinolite◻Ca2Fe2+5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Ferro-hornblende◻Ca2(Fe2+4Al)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.10Ferro-tschermakite◻Ca2(Fe2+3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-pargasiteKCa2(Mg4Al)(Si6Al2)O22Cl2Mon. 2/m : B2/m
9.DE.15'Ferro-fluoro-pargasite'(Na)(Ca2)(Fe2+4Al)(Al2Si6O22)F2
9.DE.15'Potassic-ferro-chloro-edenite'KCa2Fe2+5(AlSi7O22)Cl2
9.DE.15'Ferro-ferri-sadanagaite'NaCa2(Fe2+3Fe3+2)(Al3Si5O22)(OH)2Mon.
9.DE.15HastingsiteNaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Fluoro-edeniteNaCa2Mg5(Si7Al)O22F2Mon. 2/m : P2/m
9.DE.15PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Magnesio-fluoro-hastingsiteNaCa2(Mg4Fe3+)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15Potassic-fluoro-hastingsiteKCa2(Fe2+4Fe3+)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-hastingsiteKCa2(Fe2+4Fe3+)(Si6Al2)O22Cl2Mon. 2/m : B2/m
9.DE.15'Unnamed (F-dominant analogue of Ferri-kaersutite)'(Na,K)Ca2[Mg3(Fe3+,Fe2+)Ti](Si6Al2O22)(F,O)2Mon. 2/m : B2/m
9.DE.15EdeniteNaCa2Mg5(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-sadanagaiteKCa2(Mg3Al2)(Al3Si5O22)(OH)2Mon. 2
9.DE.15Ferri-kaersutiteNaCa2(Mg3Fe3+Ti)(Si6Al2O22)O2Mon. 2/m : B2/m
9.DE.15Potassic-pargasiteKCa2(Mg4Al)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-sadanagaiteKCa2(Fe2+3Al2)(Al3Si5O22)(OH)2Mon.
9.DE.15KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2Mon. 2/m : B2/m
9.DE.15'Ferro-chloro-pargasite'NaCa2(Fe2+4Al)(Al2Si6O22)Cl2
9.DE.15Potassic-fluoro-pargasiteKCa2(Mg4Al)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-ferri-sadanagaiteKCa2(Fe2+3Fe3+2)(Al3Si5O22)(OH)2Mon. 2/m : B2/m
9.DE.15Fluoro-pargasiteNaCa2(Mg4Al)(Si6Al2)O22F2Mon. 2/m : B2/m
9.DE.15'Parvo-mangano-edenite'{Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.15Ferro-fluoro-edeniteNaCa2Fe2+5(AlSi7O22)F2Mon. 2/m : B2/m
9.DE.15Mangani-pargasiteNaCa2(Mg4Mn3+)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15SadanagaiteNaCa2(Mg3Al2)(Si5Al3O22)(OH)2Mon.
9.DE.15Magnesio-hastingsiteNaCa2(Mg4Fe3+)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15'Ferri-sadanagaite'NaCa2(Mg3Fe3+2)(Al3Si5O22)(OH)2
9.DE.15'Ferro-sadanagaite'NaCa2(Fe3Al2)(Al3Si5O22)(OH)2
9.DE.15'Ferri-fluoro-sadanagaite'{Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)F2
9.DE.15'Ferro-ferri-fluoro-sadanagaite'{Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)F2
9.DE.15'Ferro-fluoro-sadanagaite'{Na}{Ca2}{Fe2+3Al2}(Al3Si5O22)F2
9.DE.15'Fluoro-sadanagaite'{Na}{Ca2}{Mg3Al2}(Al3Si5O22)F2
9.DE.15'Potassic-chloro-sadanagaite'KCa2(Mg3Al2)(Al3Si5O22)Cl2
9.DE.15'Potassic-ferro-chloro-sadanagaite'KCa2(Fe2+3Al2)(Al3Si5O22)Cl2
9.DE.15Ferro-edeniteNaCa2Fe2+5(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.15Oxo-magnesio-hastingsiteNaCa2(Mg3(Fe3+2-x,Tix))5(Si6Al2O22)O2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-pargasiteKCa2(Fe2+4Al)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-hastingsiteKCa2(Fe2+4Fe3+)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15'Fluoro-hastingsite'NaCa2(Fe2+4Fe3+)(Al2Si6O22)F2
9.DE.15Potassic-magnesio-hastingsiteKCa2(Mg4Fe3+)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Vanadio-pargasiteNaCa2(Mg3+4V)(Al2Si6)O22(OH)2Mon. 2/m : B2/m
9.DE.15'Ferro-kaersutite'NaCa2(Fe2+3AlTi)(Si6Al2O22)O2Mon.
9.DE.15Chromio-pargasiteNaCa2(Mg4Cr)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.15Ferro-pargasiteNaCa2(Fe2+4Al)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.20'Ghoseite'◻[Mn2+Na][Mg4Al]Si8O22(OH)2
9.DE.20Potassic-ferro-taramiteK(CaNa)(Fe2+3Al2)(Si6Al2)O22(OH)2Mon. 2/m : B2/m
9.DE.20Ferri-fluoro-katophoriteNa(CaNa)(Mg4Fe3+)(AlSi7O22)F2Mon. 2/m : B2/m
9.DE.20Barroisite◻(CaNa)(Mg3Al2)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-richteriteNa(CaNa)Mg5(Si8O22)F2Mon. 2/m : B2/m
9.DE.20Potassic-ferro-ferri-taramiteK(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20'Potassic-ferri-katophorite'K(CaNa)(Mg4Fe3+)(AlSi7O22)(OH)2
9.DE.20'Potassic-ferro-richterite'K(CaNa)Fe2+5(Si8O22)(OH)2
9.DE.20Potassic-fluoro-richteriteK(CaNa)Mg5(Si8O22)F2Mon. 2/m : B2/m
9.DE.20Potassic-richteriteK(CaNa)Mg5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferri-ghoseite◻(Mn2+Na)(Mg4Fe3+)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-taramiteNa(CaNa)(Mg3Al2)(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.20'Ferro-ferri-fluoro-katophorite'Na(CaNa)(Fe2+4Fe3+)(AlSi7O22)F2Mon.
9.DE.20RichteriteNa(CaNa)Mg5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferri-winchite◻(NaCa)(Mg4Fe3+)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.20'Fluoro-katophorite'Na(CaNa)(Mg4Al)(AlSi7O22)F2Mon.
9.DE.20HjalmariteNa(NaMn)Mg5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-taramiteNa(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20'Clinoferroholmquistite'◻Li2[Fe2+3Al2]Si8O22(OH,F)2
9.DE.20Ferro-katophoriteNa(CaNa)(Fe2+4Al)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20TaramiteNa(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20'Potassic-fluoro-katophorite'K(CaNa)(Mg4Al)(AlSi7O22)F2
9.DE.20'Ferro-fluoro-katophorite'Na(CaNa)(Fe2+4Al)(AlSi7O22)F2
9.DE.20Ferri-katophoriteNa(CaNa)(Mg4Fe3+)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20'Ferro-ferri-barroisite'◻(CaNa)(Fe2+3Fe3+2)(AlSi7O22)(OH)2
9.DE.20Ferri-taramiteNa(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20'Potassic-ferro-ferri-katophorite'K(CaNa)(Fe2+4Fe3+)(AlSi7O22)(OH)2
9.DE.20'Ferro-ferri-winchite'◻(CaNa)(Fe2+4Fe3+)Si8O22(OH)2
9.DE.20Winchite◻(CaNa)(Mg4Al)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.20'Ferro-fluoro-richterite'{Na}{CaNa}{Fe2+5}(Si8O22)F2
9.DE.20'Fluoro-winchite'◻(CaNa)(Mg4Al)(Si8O22)F2
9.DE.20'Ferro-fluoro-winchite'◻{CaNa}{Fe2+4Al}(Si8O22)F2
9.DE.20'Ferri-barroisite'◻(CaNa)(Mg3Fe3+2)(AlSi7O22)(OH)2
9.DE.20'Ferro-ferri-taramite'Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2
9.DE.20'Ferri-fluoro-barroisite'◻{CaNa}{Mg3Fe3+2}(AlSi7O22)F2
9.DE.20'Ferro-fluoro-barroisite'◻{CaNa}{Fe2+3Al2}(AlSi7O22)F2
9.DE.20'Ferro-ferri-fluoro-barroisite'◻{CaNa}{Fe2+3Fe3+2}(AlSi7O22)F2
9.DE.20'Fluoro-barroisite'◻{CaNa}{Mg3Al2}(AlSi7O22)F2
9.DE.20Ferro-ferri-katophoriteNa(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.20'Ferri-fluoro-taramite'Na(CaNa)(Mg3Fe3+2)(Al2Si6O22)F2
9.DE.20'Ferro-ferri-fluoro-taramite'Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)F2
9.DE.20'Ferro-fluoro-taramite'Na(CaNa)(Fe2+3Al2)(Al2Si6O22)F2
9.DE.20'Potassic-ferri-taramite'K(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2
9.DE.20'Magnesiotaramite'{Na}{CaNa}{Mg3AlFe3+}(Al2Si6O22)(OH)2Mon.
9.DE.20'Ferro-barroisite'◻(CaNa)(Fe2+3Al2)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20Scandio-winchite◻(NaCa)(Mg4Sc)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-richteriteNa(CaNa)Fe2+5(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.20KatophoriteNa(CaNa){Mg4Al)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20'Ferro-winchite'◻(CaNa)(Fe2+4Al)(Si8O22)(OH)2Mon.
9.DE.25'Clino-sodic-fluoro-holmquistite'{Na}{Li2}{Mg4Al}(Si8O22)F2
9.DE.25Ferro-ferri-nybøiteNaNa2(Fe2+3,Mg)Fe3+2)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.25Clino-ferro-ferri-holmquistite◻Li2(Fe2+3Fe3+2)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25'Oxo-pargasite'NaCa2(Mg3(Al2-xTix))5(Si6Al2O22)O2
9.DE.25'Ferri-nybøite'NaNa2(Mg3Fe3+2)(AlSi7O22)(OH)2Mon.
9.DE.25'Ferro-ferri-leakeite'NaNa2(Fe2+2Fe3+2Li)Si8O22(OH)2Mon.
9.DE.25Ferro-ferri-fluoro-leakeiteNaNa2(Fe2+2Fe3+2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Ferri-leakeiteNaNa2(Mg2Fe3+2Li)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Fluoro-pedriziteNaLi2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25EckermanniteNaNa2(Mg4Al}Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25ArfvedsoniteNaNa2(Fe2+4Fe3+)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25'Mangano-ferri-fluoro-leakeite'NaNa2(Mn2+2Fe3+2Li)(Si8O22)F2Mon.
9.DE.25Ferri-obertiiteNaNa2(Mg3Fe3+Ti)Si8O22O2 Mon. 2/m : B2/m
9.DE.25Riebeckite◻Na2(Fe2+3Fe3+2)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25'Unnamed (Possible K-analogue of Ferri-obertiite)'KNa2((Mg,Fe,Na)3Fe3+(Ti,Fe))Si8O22(O,F)2
9.DE.25Magnesio-fluoro-arfvedsoniteNaNa2(Mg4Fe3+)[Si8O22]F2Mon. 2/m : B2/m
9.DE.25'Ferro-fluoro-glaucophane'◻[Na2][Fe2+3Al2]Si8O22F2
9.DE.25Oxo-mangani-leakeiteNaNa2(Mn3+4Li)Si8O22O2Mon. 2/m : B2/m
9.DE.25Fluoro-leakeiteNaNa2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.25'Sodic-ferri-clinoferroholmquistite'Na0.5{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2Mon.
9.DE.25'Potassic-mangano-mangani-ungarettiite'KNa2(Mn2+2Mn3+3)Si8O22O2
9.DE.25Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2Mon. 2/m : B2/m
9.DE.25Ferri-pedriziteNaLi2(Mg2Fe3+2Li)Si8O22(OH)2Mon.
9.DE.25Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-fluoro-pedriziteNaLi2(Fe2+2Al2Li)[Si8O22]F2Mon. 2/m : B2/m
9.DE.25Potassic-ferri-leakeiteKNa2(Mg2Fe3+2Li)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Potassic-magnesio-fluoro-arfvedsoniteKNa2(Mg4Fe3+)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Mangani-obertiiteNaNa2(Mg3Mn3+Ti4+)Si8O22O2Mon. 2/m : B2/m
9.DE.25Scandio-fluoro-eckermanniteNaNa2(Mg4Sc)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25'Ferro-eckermannite'NaNa2(Fe2+4Al)Si8O22(OH)2Mon.
9.DE.25Ferro-ferri-pedriziteNaLi2(Fe2+2Fe3+2Li)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25'Pedrizite'NaLi2(LiMg2Al2)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-pedriziteNaLi2(Fe2+2Al2Li)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Potassic-mangani-leakeiteKNa2(Mg2Mn3+2Li)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25'Clino-fluoro-holmquistite'◻{Li2}{Mg3Al2}(Si8O22)F2
9.DE.25Ferro-ferri-obertiiteNaNa2(Fe2+3Fe3+Ti)Si8O22O2Mon. 2/m : B2/m
9.DE.25Magnesio-riebeckite◻Na2(Mg3Fe3+2)(Si8O22)(OH)2Mon.
9.DE.25Potassic-magnesio-arfvedsoniteKNa2(Mg4Fe3+)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Fluoro-nybøiteNaNa2(Mg3Al2)(AlSi7O22)(F,OH)2Mon. 2/m : B2/m
9.DE.25Mangano-ferri-eckermanniteNaNa2(Mn2+4Fe3+)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25'Fluoro-glaucophane'◻[Na2][Mg3Al2]Si8O22F2
9.DE.25Fluoro-riebeckite◻Na2(Fe2+3Fe3+2)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Magnesio-fluoro-riebeckite◻Na2(Mg3Fe3+2)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25'Fluoro-eckermannite'NaNa2(Mg4Al}Si8O22F2
9.DE.25'Ferro-fluoro-eckermannite'NaNa2(Fe2+4Al}Si8O22F2
9.DE.25'Fluoro-arfvedsonite'NaNa2(Fe2+4Fe3+)Si8O22F2
9.DE.25Magnesio-arfvedsoniteNaNa2(Mg4Fe3+)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25'Ferri-fluoro-nybøite'NaNa2(Mg3Fe3+2)(AlSi7O22)F2
9.DE.25'Ferro-ferri-fluoro-nybøite'NaNa2(Fe2+3Fe3+2)(AlSi7O22)F2
9.DE.25Ferro-glaucophane◻Na2(Fe2+3Al2)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25'Ferro-fluoro-nybøite'NaNa2(Fe2+3Al2)(AlSi7O22)F2
9.DE.25Mangani-dellaventuraiteNaNa2(MgMn3+2Ti4+Li)Si8O22O2Mon. 2/m : B2/m
9.DE.25'Ferro-leakeite'NaNa2(Fe2+2Al2Li)(Si8O22)(OH)2
9.DE.25'Leakeite'NaNa2(Mg2Al2Li)(Si8O22)(OH)2
9.DE.25'Potassic-leakeite'KNa2(Mg2Al2Li)(Si8O22)(OH)2
9.DE.25'Ferri-fluoro-pedrizite'NaLi2(LiMg2Fe3+2)(Si8O22)F2
9.DE.25'Ferro-ferri-fluoro-pedrizite'NaLi2(LiFe2+2Fe3+2)(Si8O22)F2
9.DE.25'Ferro-nybøite'NaNa2(Fe2+3Al2)(AlSi7O22)(OH)2Mon.
9.DE.25'Clino-ferro-ferri-fluoro-holmquistite'◻{Li2}{Fe2+3Fe3+2}(Si8O22)F2
9.DE.25Mangano-mangani-ungarettiiteNaNa2(Mn2+2Mn3+3)(Si8O22)O2Mon. 2/m : B2/m
9.DE.25'Clino-ferri-fluoro-holmquistite'◻{Li2}{Mg3Fe3+2}(Si8O22)F2
9.DE.25'Clino-ferro-fluoro-holmquistite'◻{Li2}{Fe2+3Al2}(Si8O22)F2

RadioactivityHide

Radioactivity:
Element % Content Activity (Bq/kg) Radiation Type
Uranium (U) 0.0000% 0 α, β, γ
Thorium (Th) 0.0000% 0 α, β, γ
Potassium (K) 4.0101% 1,243 β, γ

For comparison:

  • Banana: ~15 Bq per fruit
  • Granite: 1,000–3,000 Bq/kg
  • EU exemption limit: 10,000 Bq/kg

Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.

Interactive Simulator:

Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!

Activity: –

DistanceDose rateRisk
1 cm
10 cm
1 m

The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).

D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield

Other InformationHide

IR Spectrum:
The IR spectrum contains bands (sh = shoulder) at (cm-1) 3700, 3675, 1134, 1076, 1025 sh, 990 sh, 957, 900 sh, 741, 692, 661, 643, 520 sh, 491, 445 and 430 sh.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Potassic-arfvedsoniteHide

References for Potassic-arfvedsoniteHide

Localities for Potassic-arfvedsoniteHide

Showing 16 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Hide all sections | Show all sections

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Newfoundland and Labrador
    • Labrador
      • North Red Wine Pluton
Mitchell et al. (2015)
RRUFF database U of Arizona +1 other reference
  • Nunavut
    • Qikiqtaaluk Region
      • Baffin Island
Hogarth (1997)
Greenland
 
  • Kujalleq
    • Igaliku Complex
Bradshaw (1988) +1 other reference
    • Ilímaussaq complex
      • Kangerluarsuk Fjord
        • Head of Kangerluarsuk
          • Lilleelv
            • Pegmatite Valley
Pekov et al. (2004)
India
 
  • Telangana
    • Nalgonda District
Kaur et al. (2017)
Kaur et al. (2016)
Russia
 
  • Murmansk Oblast
    • Koashva Mt
Konopleva et al. (2008)
    • Kukisvumchorr Mt
      • Kirovskii apatite mine
        • 252 m level
Pekov et al. (2004) +1 other reference
Konopleva et al. (2008)
    • Lovozersky District
      • Karnasurt Mountain
        • Karnasurt mine
Pekov et al. (2004) +1 other reference
      • Suoluai River Valley
Selivanova et al. (2024)
Arzamastseva et al. (1999) +1 other reference
Konopleva et al. (2008)
Konopleva et al. (2008)
  • Zabaykalsky Krai
    • Kalarsky District
Victor V. Sharygin analytycal data (2012)
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