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Montgomeryite

A valid IMA mineral species - grandfathered
This page kindly sponsored by Zach Berghorst
09985670017434733777355.jpg
Montgomeryite

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
07779570017435033133239.jpg
Montgomeryite

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
08586380017474220434091.jpg
Montgomeryite

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
06771150017865251597036.jpg
Montgomeryite

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
04254090017434462957626.jpg
Montgomeryite

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
02581880017271925136748.jpg
Montgomeryite

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
09985670017434733777355.jpg
Montgomeryite

Tip Top Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
07779570017435033133239.jpg
Montgomeryite

Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
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About MontgomeryiteHide

02904480017271925287018.jpg
Arthur Montgomery
Formula:
Ca4MgAl4(PO4)6(OH)4 · 12H2O
Colour:
Dark green to light green, colourless, red, yellow
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.53
Crystal System:
Monoclinic
Name:
After Arthur Montgomery (2 December 1909, New York City, New York, USA - 31 December 1999, Albuquerque, New Mexico, USA), American mineralogist, Professor of Geology, Lafayette College, Easton, Pennsylvania, USA, who collected the first specimens.
Isostructural with:
Kingsmountite
The Mg analogue of kingsmountite and fanfaniite.

A secondary mineral in sedimentary phosphate nodules and as a late-stage mineral in highly oxidized phosphate nodules in granitic pegmatite.


Unique IdentifiersHide

Mindat ID:
2767
Long-form identifier:
mindat:1:1:2767:6

IMA Classification of MontgomeryiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca4MgAl4(PO4)6(OH)4·12H2O

Classification of MontgomeryiteHide

Strunz-mindat (2026):
8.DH.25

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
Dana 8th ed.:
42.11.8.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
Hey's CIM Ref.:
19.8.12

19 : Phosphates
8 : Phosphates of Al and other metals

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

Physical Properties of MontgomeryiteHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
Dark green to light green, colourless, red, yellow
Comment:
Coloration may be zoned.
Hardness:
4 on Mohs scale
Cleavage:
Perfect
On {010}, perfect; on {100}, poor.
Density:
2.53 g/cm3 (Measured)    2.523 g/cm3 (Calculated)

Optical Data of MontgomeryiteHide

Type:
Biaxial (-)
RI values:
nα = 1.572 nβ = 1.578 nγ = 1.582
2V:
Measured: 75° , Calculated: 78°
Max. Birefringence:
δ = 0.010
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:
Moderate (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:
r < v strong
Pleochroism:
Weak
Comments:
X = Colourless to pale green
Y = Z = Colourless

also, may exhibit:

X = Light orange-brown
Y = Pale magenta-pink
Z = Light orange-brown

Chemistry of MontgomeryiteHide

Mindat Formula:
Ca4MgAl4(PO4)6(OH)4 · 12H2O
Element Weights:
Element% weight
O55.816 %
P16.208 %
Ca13.982 %
Al9.413 %
H2.461 %
Mg2.120 %

Calculated from ideal end-member formula.
O
P
Ca
Al
H
Mg
Elements listed:
Al, Ca, H, Mg, O, P - search for minerals with similar chemistry

Crystallography of MontgomeryiteHide

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Cell Parameters:
a = 10.02 Å, b = 24.12 Å, c = 6.24 Å
β = 91.55°
Ratio:
a:b:c = 0.415 : 1 : 0.259
Unit Cell V:
1,507.55 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals lathlike, flattened on {010} and elongated and striated along [001]; terminated by pyramids. {010} dominant, with many {hk0} vicinal prism forms. Commonly occur in subparallel growths in contact on {010}. Massive; as subparallel aggregates of coarse plates.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000486MontgomeryiteFanfani L, Nunzi A, Zanazzi P F, Zanzari A R (1976) Additional data on the crystal structure of montgomeryite American Mineralogist 61 12-1419760293
0000410MontgomeryiteMoore P B, Araki T (1974) Montgomeryite, Ca4Mg(H2O)12[Al4(OH)4(PO4)6]:. Its crystal structure and relation to Vauxite, Fe2(H2O)4[Al4(OH)4(H2O)4(PO4)4].4H2O American Mineralogist 59 843-85019740293
CIF Raw Data - click here to close

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
21 : Chemically precipitated carbonate, phosphate, iron formations
Geological Setting:
Granitic pegmatites

Type Occurrence of MontgomeryiteHide

Type Locality:
ⓘ Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA: #95481.
Geological Setting of Type Material:
Phosphate nodules in sedmimentary rocks.
Associated Minerals at Type Locality:
CrandalliteEnglishiteGordoniteVarisciteWardite

Other Language Names for MontgomeryiteHide

Relationship of Montgomeryite to other SpeciesHide

Member of:
Montgomeryite Subgroup > Calcioferrite Group
Other Members of Montgomeryite Subgroup:
FanfaniiteCa4Mn2+Al4(PO4)6(OH)4 · 12H2OMon. 2/m : B2/b
KingsmountiteCa3Mn2+FeAl4(PO4)6(OH)4 · 12H2OTric. 1 : P1

Common AssociatesHide

Associations Based on Photo Data:
51 photos of Montgomeryite associated with WhitlockiteCa9Mg(PO4)6(PO3OH)
44 photos of Montgomeryite associated with VarisciteAlPO4 · 2H2O
42 photos of Montgomeryite associated with EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
40 photos of Montgomeryite associated with RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2O
38 photos of Montgomeryite associated with TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2O
35 photos of Montgomeryite associated with WarditeNaAl3(PO4)2(OH)4 · 2H2O
35 photos of Montgomeryite associated with CrandalliteCaAl3(PO4)(PO3OH)(OH)6
30 photos of Montgomeryite associated with RobertsiteCa2Mn3+3(PO4)3O2 · 3H2O
18 photos of Montgomeryite associated with MitridatiteCa2Fe3+3(PO4)3O2 · 3H2O
15 photos of Montgomeryite associated with FairfielditeCa2Mn2+(PO4)2 · 2H2O

Related Minerals - Strunz-mindat GroupingHide

8.DH.Thebaite-(NH4)(NH4)3Al(C2O4)(PO3OH)2(H2O)Mon. 2/m : P21/b
8.DH.Whiteite-(MnMnMn)Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.Ammoniotinsleyite(NH4)Al2(PO4)2(OH) · 2H2OMon. 2/m : P21/m
8.DH.Bergbauerite(H2O)2Mn2(Fe2Ti)(PO4)4(OH)2(H2O)10 · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.Dendoraite-(NH4)(NH4)2NaAl(C2O4)(PO3OH)2(H2O)2Mon. 2/m
8.DH.Rowleyite[Na(NH4,K)9Cl4][V5+,4+2(P,As)O8]6 · n[H2O,Na,NH4,K,Cl]Iso.
8.DH.HochleitneriteMn2Ti3(PO4)4O2(H2O)2 · 14H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.Whiteite-(CaMnFe)CaMnFe2Al2(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.05MinyuliteKAl2(PO4)2F · 4H2OOrth. mm2 : Pba2
8.DH.10LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
8.DH.10TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
8.DH.10Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon. 2/m
8.DH.15Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMn){Na}{Mn2+}{(Mn2+,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(MnMnMg)MnMnMg2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnZn){Ca}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnMg){Mn2+}{Mn2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnFe){Mn2+}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15'Jahnsite-(CaFeFe)'{Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15'Jahnsite-(CaMgMg)'{Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(MnMnZn){Mn2+}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaMgMg)CaMg3Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.15Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Jahnsite-(MnMnMn){Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15'Kaluginite'(Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2OOrth.
8.DH.15Jahnsite-(CaFeMg){Ca}{Fe2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaMnMn){Ca}{Mn2+}{Mn2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaFeMg){Na}{Fe3+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.20SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm(2/m2/m2/m) : Pcca
8.DH.20Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20JuonniiteCaMgSc(PO4)2(OH) · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.20OveriteCaMgAl(PO4)2(OH) · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.25CalcioferriteCa4MgFe3+4(PO4)6(OH)4 · 12H2OMon. 2/m : B2/b
8.DH.25ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 · 12H2OMon.
8.DH.25FanfaniiteCa4Mn2+Al4(PO4)6(OH)4 · 12H2OMon. 2/m : B2/b
8.DH.25KingsmountiteCa3Mn2+FeAl4(PO4)6(OH)4 · 12H2OTric. 1 : P1
8.DH.30PararobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. 2/m : P21/b
8.DH.30RobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. m : Bb
8.DH.30ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30Sailaufite(Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2OMon. m : Bm
8.DH.30MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.35Sperlingite (H2O)K(Mn2+Fe3+)(Al2Ti)(PO4)4[O(OH)] [(H2O)9(OH)] · 4H2OMon. 2/m : P21/b
8.DH.35PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OMon. m
8.DH.35Hydroxylbenyacarite(H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 · 4H2O Orth. mmm(2/m2/m2/m) : Pbca
8.DH.35MacraeiteK(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 · 4H2OMon. 2/m : P21/b
8.DH.35Benyacarite(H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.DH.35Fluormacraeite [(H2O)K]Mn2(Fe2Ti)(PO4)4(OF)(H2O)10 · 4H2OMon. 2/m : P21/b
8.DH.40XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
8.DH.45MahnertiteNaCu3(AsO4)2Cl · 5H2OTet. 4/mmm(4/m2/m2/m) : I4/mmm
8.DH.50AndyrobertsiteKCdCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.50CalcioandyrobertsiteKCaCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.55EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 2/m
8.DH.60BouazzeriteBi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2OMon. 2/m
8.DH.65GalliskiiteCa4Al2(PO4)2F8 · 5H2OTric. 1 : P1
8.DH.70JoteiteCa2CuAl(AsO4)[AsO3(OH)]2(OH)2 · 5H2OTric. 1 : P1
8.DH.75KampeliteBa6Mg3Sc8(PO4)12(OH)6 · 7H2OOrth. mmm(2/m2/m2/m) : Pnma
8.DH.80KapundaiteNaCaFe4(PO4)4(OH)3 · 5H2OTric. 1 : P1
8.DH.85VaniniiteCa2Mn2+3Mn3+2O2(AsO4)4 · 2H2OMon. 2/m : P21/b

Other InformationHide

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 MontgomeryiteHide

References for MontgomeryiteHide

Localities for MontgomeryiteHide

Showing 61 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.
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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.
Australia
 
Trueman (1965)
  • New South Wales
    • Westmoreland County
Podgson RE +1 other reference
  • South Australia
    • Pastoral Unincorporated Area
      • Boolcoomatta Reserve (Boolcoomata Station)
      • Iron Knob
Pilkington et al. (1979)
  • Victoria
    • Moorabool Shire
      • Parwan
Birch et al. (1993)
  • Western Australia
    • Meekatharra Shire
      • Milgun Station
Mineralogical Magazine 39 (1974) +1 other reference
      • Woodlands Station
Nickel (2008)
Austria
 
  • Styria
    • Leoben District
      • Sankt Peter-Freienstein
Walter et al. (1998)
Brazil
 
  • Minas Gerais
    • Itinga
      • Taquaral
Cassedanne et al. (1973)
Cape Verde
 
  • Barlavento Islands
Figueiredo +3 other references
France
 
  • Nouvelle-Aquitaine
    • Dordogne
      • Sarlat-la-Canéda
        • Cénac-et-Saint-Julien
Karkanas et al. (2002)
  • Occitanie
    • Pyrénées-Orientales
      • Perpignan
Lacroix (1910)
Quattropani et al. (1999) +1 other reference
Germany
 
  • Bavaria
    • Lower Bavaria
      • Regen District
        • Zwiesel
          • Rabenstein
Weiß (1990)
  • Hesse
    • Darmstadt
      • Bergstraße
        • Heppenheim
          • Kirschhausen
Wittern (2001)
      • Darmstadt-Dieburg
        • Messel
Liesegang et al. (2022)
    • Giessen Region
      • Lahn-Dill-Kreis
        • Lahnau
          • Waldgirmes
SEM-EDS and Raman Spectroscopy by Joy ...
Israel
 
  • Haifa District
    • Hadera
      • Hof HaCarmel
Goldberg et al. (1975)
Weiner et al. (1993)
Italy
 
  • Sardinia
    • South Sardinia Province
Orlandi (2011)
  • Sicily
    • Trapani Province
      • Castellammare del Golfo
Vattano M. et al. (2013) +1 other reference
Kazakhstan
 
  • Turkistan Region
Bernard et al. (2004)
Mexico
 
  • Coahuila
    • Cuatro Ciénegas Municipality
      • Cuatro Ciénegas
        • Limestone caves
Forti (2006)
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Amerzgane Cercle
        • Ouisselsate Caïdat
Fransolet et al. (1987)
  • Marrakesh-Safi Region
    • Rehamna Province
      • Sidi Bou Othmane Cercle
        • Jebilet Mountain (Djebilet Mountain)
          • Sidi Bou Othmane
Favreau (2012)
Namibia
 
  • Erongo Region
    • Dâures Constituency
von Bezing (2007)
Keller (1985)
Portugal
 
  • Guarda
    • Sabugal
      • Bendada
Schnorrer-Köhler (1991)
  • Viseu
    • Sátão
      • Ferreira de Aves
        • Aldeia Nova
South Africa
 
  • Gauteng
    • West Rand District Municipality
      • Far West Rand
        • Western Sector
          • Carletonville
Martini et al. (1978)
  • North West
    • Dr Kenneth Kaunda District Municipality
      • JB Marks Local Municipality
        • Ventersdorp
Martini et al. (1978)
  • Western Cape
    • West Coast District Municipality
      • Cederberg Local Municipality
Miller et al. (2013)
Spain
 
  • Castile and Leon
    • Salamanca
      • Garcirrey
Christian Rewitzer collection
  • Catalonia
    • Barcelona
      • Baix Llobregat
Camprubí et al. (4)
Melgarejo et al. (1988)
Joan Rosell. RosellMinerals
Bareche (2005)
Díaz-Acha et al. (2022)
      • Vallès Occidental
        • Montcada i Reixac
Mineralogistes de Catalunya (1997)
  • Navarre
    • Esteríbar
      • Eugui
Calvo Rebollar (2015)
Sweden
 
  • Norrbotten County
    • Kiruna
      • Svappavaara
Lorin (2022)
Thailand
 
  • Chiang Mai Province
Lenoble et al. (2006, September)
USA
 
  • Nevada
    • Elko County
Castor et al. (2004)
    • Esmeralda County
      • Candelaria Mining District (Columbus Mining District)
Collected by Dick Thomssen.
    • Humboldt County
      • Iron Point Mining District
        • Valmy
Silver Coin Mine. Compact Disc. Paul ...
      • Osgood Mountains
        • Potosi Mining District
Rocks & Minerals. Nov. 1999. +2 other references
Newmont Mining Corporation
Min News (1999)
    • Mineral County
      • Candelaria Mining District
Kampf et al. (2016)
        • Candelaria Silver Mine
Collected by Paul Adams. EDS and XRD ...
    • Nye County
      • Toquima Range
        • Northumberland Mining District
Castor et al. (2004)
    • Pershing County
      • Willard Mining District
Castor et al. (2004)
  • New Hampshire
    • Cheshire County
      • Marlow
Czaja (2025)
  • South Dakota
    • Custer County
      • Custer Mining District
        • Fourmile
Rocks & Minerals: 60: 117. +1 other reference
        • Pringle
          • Cicero Peak
Smith et al. (2000)
    • Lawrence County
      • Bald Mountain Mining District (Portland Mining District)
Loomis (2011)
    • Pennington County
      • Keystone Mining District
        • Keystone
Rocks & Minerals: 57: 160 &/or 60: 110 ...
  • Utah
    • Box Elder County
      • Lucin
        • Utahlite Hill
Don Howard (1999)
    • Utah County
      • Sunshine Mining District
        • Fairfield
Palache et al. (1951) +1 other reference
Wilson (2010)
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