Manganonordite-(Ce)
A valid IMA mineral species
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About Manganonordite-(Ce)
Formula:
Na3SrCeMn2+Si6O17
Colour:
Greyish-pink when fresh, black to brown or yellow when altered
Lustre:
Greasy
Hardness:
5 - 5½
Specific Gravity:
3.43
Crystal System:
Orthorhombic
Member of:
Name:
Named as the Mn++ dominant analogue of nordite-(Ce). Nordite series is named after the word for north because of its northern origin in the Lovozero Massif.
Unique Identifiers
Mindat ID:
7170
Long-form identifier:
mindat:1:1:7170:9
IMA Classification of Manganonordite-(Ce)
Approved
IMA Formula:
Na3SrCe3+Mn2+Si6O17
Approval year:
1997
First published:
1998
Type description reference:
Pekov, I. V., Chukanov, N. V., Kononkova, N. N., Belakovsky, D. I., Pushcharovsky, D. Y., Vinogradova, S. A. (1998) Ferronordite-(Ce) Na3SrFeSi6O17 and manganonordite-(Ce) Na3SrMnSi6O17 — the new minerals from Lovozero massif, Kola Peninsula. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 127 (1) 32-41
Classification of Manganonordite-(Ce)
9.DO.15
9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
9 : SILICATES (Germanates)
D : Inosilicates
O : Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mnor-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Manganonordite-(Ce)
Greasy
Transparency:
Transparent
Comment:
Greasy on fractures
Colour:
Greyish-pink when fresh, black to brown or yellow when altered
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Hardness:
VHN15=777 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {100}, with two additional {h0l} cleavages.
Perfect on {100}, with two additional {h0l} cleavages.
Fracture:
Irregular/Uneven
Density:
3.43(3) g/cm3 (Measured) 3.51(1) g/cm3 (Calculated)
Optical Data of Manganonordite-(Ce)
Type:
Biaxial (+)
RI values:
nα = 1.623(3) nβ = 1.636(2) nγ = 1.642(2)
2V:
Measured: 60° (10), Calculated: 68°
Max. Birefringence:
δ = 0.019
Based on recorded range of RI values above.
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.
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:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
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.
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:
weak
Optical Extinction:
X = a; Y = b; Z = c.
Chemistry of Manganonordite-(Ce)
Mindat Formula:
Na3SrCeMn2+Si6O17
Element Weights:
Crystallography of Manganonordite-(Ce)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pcca
Setting:
Pcca
Cell Parameters:
a = 14.44(2) Å, b = 5.187(5) Å, c = 19.82(1) Å
Ratio:
a:b:c = 2.784 : 1 : 3.821
Unit Cell V:
1,484.52 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Thin platy crystals, flattened. Main form is {100}.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.215 Å | (100) |
| 3.326 Å | (67) |
| 2.965 Å | (83) |
| 2.875 Å | (55) |
| 2.597 Å | (54) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Manganonordite-(Ce)
Co-Type Localities:
General Appearance of Type Material:
Rosette-like aggregates, up to 5-10 mm in diameter, consisting of tabular crystals.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Moscow, Russia.
Geological Setting of Type Material:
In an alkaline massif within nests and veinlets of pegmatoid ussingite-bearing rocks.
Associated Minerals at Type Locality:
Reference:
Pekov, I. V., Chukanov, N. V., Kononkova, N. N., Belakovsky, D. I., Pushcharovsky, D. Y., Vinogradova, S. A. (1998) Ferronordite-(Ce) Na3SrFeSi6O17 and manganonordite-(Ce) Na3SrMnSi6O17 — the new minerals from Lovozero massif, Kola Peninsula. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 127 (1) 32-41
Synonyms of Manganonordite-(Ce)
Other Language Names for Manganonordite-(Ce)
Relationship of Manganonordite-(Ce) to other Species
Member of:
Other Members of Nordite Group:
| Ferronordite-(Ce) | Na3SrCeFe2+Si6O17 | Orth. mmm(2/m2/m2/m) : Pcca |
| Ferronordite-(La) | Na3Sr(La,Ce)FeSi6O17 | Orth. |
| Illoqite-(Ce) | Na2NaBaCeZnSi6O17 | Orth. mmm(2/m2/m2/m) : Pcca |
| Nordite-(Ce) | (Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 | Orth. mmm(2/m2/m2/m) : Pcca |
| Nordite-(La) | (La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 | Orth. mmm(2/m2/m2/m) : Pcca |
Common Associates
Associations Based on Photo Data:
| 3 photos of Manganonordite-(Ce) associated with Ussingite | Na2AlSi3O8OH |
| 2 photos of Manganonordite-(Ce) associated with Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O |
| 1 photo of Manganonordite-(Ce) associated with Gerasimovskite | Mn2+(Nb,Ti)5O12 · 9H2O (?) |
| 1 photo of Manganonordite-(Ce) associated with Birnessite | (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O |
| 1 photo of Manganonordite-(Ce) associated with Rhabdophane-(La) | La(PO4) · H2O |
Related Minerals - Strunz-mindat Grouping
| 9.DO. | Braccoite | NaMn2+5[Si5As5+O17(OH)](OH) |
| 9.DO. | Illoqite-(Ce) | Na2NaBaCeZnSi6O17 |
| 9.DO.05 | Pyroxferroite | (Fe,Mn,Ca)SiO3 |
| 9.DO.05 | Pyroxmangite | Mn2+SiO3 |
| 9.DO.10 | Pellyite | Ba2CaFe2+2Si6O17 |
| 9.DO.15 | Ferronordite-(Ce) | Na3SrCeFe2+Si6O17 |
| 9.DO.15 | Nordite-(Ce) | (Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 |
| 9.DO.15 | Nordite-(La) | (La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 |
| 9.DO.15 | Ferronordite-(La) | Na3Sr(La,Ce)FeSi6O17 |
| 9.DO.15 | Meieranite | Na2Sr3MgSi6O17 |
| 9.DO.20 | Alamosite | PbSiO3 |
| 9.DO.25 | Liebauite | Ca3Cu5Si9O26 |
| 9.DO.30 | Vladykinite | Na3Sr4(Fe2+Fe3+)Si8O24 |
| 9.DO.30 | Rundqvistite-(Ce) | Na3(Sr3Ce)[Zn2Si8O24] |
Other Information
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 Manganonordite-(Ce)
mindat.org URL:
https://www.mindat.org/min-7170.html
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References for Manganonordite-(Ce)
Reference List:
Pekov, I. V., Chukanov, N. V., Kononkova, N. N., Belakovsky, D. I., Pushcharovsky, D. Y., Vinogradova, S. A. (1998) Ferronordite-(Ce) Na3SrFeSi6O17 and manganonordite-(Ce) Na3SrMnSi6O17 — the new minerals from Lovozero massif, Kola Peninsula. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 127 (1) 32-41
Localities for Manganonordite-(Ce)
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Pekov et al. (1998) +2 other references |
| Pekov et al. (1998) +2 other references |
| Yakovenchuk et al. (2011) |
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Pegmatite No. 60, Second Eastern Stream, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia