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Montanite

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Formula:
Bi
 
2
(TeO
 
6
) · 2H
 
2
O
Colour:Yellowish, greenish to ...
Name:From the locality where it was found in the state of Montana, USA.


An alteration product of Tetradymite.

Classification of Montanite

IMA status:Questionable/Doubtful
Strunz 8th edition ID:4/K.15-60
Nickel-Strunz 10th (pending) edition ID:7.CD.60

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
Dana 7th edition ID:33.2.2.1
Dana 8th edition ID:33.2.2.1

33 : SELENATES AND TELLURATES
2 : (AB)m(XO6)·xH2O, where x can equal zero
Hey's CIM Ref.:28.4.14

28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates
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Type Occurrence of Montanite

Co-type Localities:Highland District (Siberia District), Silver Bow Co., Montana, USA
Fish Creek placers (Highland Gulch placers), Highland District (Siberia District), Silver Bow Co., Montana, USA
Year of Discovery:1868

Physical Properties of Montanite

Lustre:Waxy, Dull
Diaphaneity (Transparency):Opaque
Colour:Yellowish, greenish to white
Comment:Soft

Crystallography of Montanite

Morphology:Earthy to compact.

Optical Data of Montanite

Type:Biaxial (-)
RI values: nα = 2.090 nβ = 2.090
Maximum Birefringence:δ = 2.090

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r < v extreme

Chemical Properties of Montanite

Formula:
Bi
 
2
(TeO
 
6
) · 2H
 
2
O
Simplified for copy/paste:Bi2(TeO6)·2H2O
Essential elements:Bi, H, O, Te
All elements listed in formula:Bi, H, O, Te

Relationship of Montanite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.CD.05Matteuccite
NaHSO
 
4
· H
 
2
O
7.CD.10Mirabilite
Na
 
2
SO
 
4
· 10H
 
2
O
7.CD.15Lecontite
(NH
 
4
,K)NaSO
 
4
· 2H
 
2
O
7.CD.20Hydroglauberite
Na
 
10
Ca
 
3
(SO
 
4
)
 
8
· 6H
 
2
O
7.CD.25Eugsterite
Na
 
4
Ca(SO
 
4
)
 
3
· 2H
 
2
O
7.CD.30Görgeyite
K
 
2
Ca
 
5
(SO
 
4
)
 
6
· H
 
2
O
7.CD.35Koktaite
(NH
 
4
)
 
2
Ca(SO
 
4
)
 
2
· H
 
2
O
7.CD.35Syngenite
K
 
2
Ca(SO
 
4
)
 
2
· H
 
2
O
7.CD.40Gypsum
CaSO
 
4
· 2H
 
2
O
7.CD.45Bassanite
CaSO
 
4
· 0.5H
 
2
O
7.CD.50Zircosulfate
(Zr,Ti)(SO
 
4
)
 
2
· 4H
 
2
O
7.CD.55Schieffelinite
Pb
 
8
(TeO
 
4
)
 
5
(SO
 
4
)
 
3
· 8H
 
2
O
7.CD.65Omongwaite
Na
 
2
Ca
 
5
(SO
 
4
)
 
6
· 3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
28.4.1Xocomecatlite
Cu
 
3
(TeO
 
4
)(OH)
 
4
28.4.2Carlfriesite
CaTe
4+
2
Te
6+
 
O
 
8
28.4.3Yafsoanite
Ca
 
3
Zn
 
3
(TeO
 
6
)
 
2
28.4.4Tlalocite
Cu
 
10
Zn
 
6
(Te
6+
 
O
 
4
)
 
2
(Te
4+
 
O
 
3
)(OH)
 
25
Cl · 27H
 
2
O
28.4.5Oboyerite
H
 
6
(Pb,Ca)
 
6
(Te
4+
 
O
 
3
)
 
3
(Te
6+
 
O
 
6
)
 
2
· 2H
 
2
O
28.4.6Schieffelinite
Pb
 
8
(TeO
 
4
)
 
5
(SO
 
4
)
 
3
· 8H
 
2
O
28.4.7Girdite
H
 
2
Pb
 
3
(Te
4+
 
O
 
3
)(Te
6+
 
O
 
6
)
28.4.8Khinite
Pb
2+
 
Cu
2+
3
Te
6+
 
O
 
6
(OH)
 
2
28.4.9Parakhinite
Pb
2+
 
Cu
2+
3
Te
6+
 
O
 
6
(OH)
 
2
28.4.10Dugganite
Pb
 
3
Zn
 
3
(AsO
 
4
)
 
2
(TeO
 
6
)
28.4.11Kuksite
Pb
 
3
Zn
 
3
(PO
 
4
)
 
2
(TeO
 
6
)
28.4.12Cheremnykhite
Pb
 
3
Zn
 
3
(VO
 
4
)
 
2
(TeO
 
6
)
28.4.13Tlapallite
H
 
6
(Ca,Pb)
 
2
(Cu,Zn)
 
3
(TeO
 
3
)
 
4
(TeO
 
6
)(SO
 
4
)
28.4.15Kuranakhite
PbMn
4+
 
Te
6+
 
O
 
6
28.4.16Cuzticite
Fe
3+
2
(TeO
 
6
) · 3H
 
2
O
28.4.17Yecoraite
Fe
3+
3
Bi
 
5
(Te
6+
 
O
 
4
)
 
2
(Te
4+
 
O
 
3
)O
 
9
· 9H
 
2
O

Other Names for Montanite

Other Languages:
German:Montanit
Simplified Chinese:碲铋华
Spanish:Montanita
Traditional Chinese:碲鉍華

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Montanite

Reference List:

- +
Genth (1868) American Journal of Science: 45: 318.

Mingaye (1888) Australasian Association for the Advancement of Science: 1: 116.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 112.

Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 636-637.

Doklady Akademii Nauk SSSR (1980): 255: 968.

Internet Links for Montanite

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  • Localities for Montanite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • New South Wales
      • Murray Co.
        • Bullongong
          • Lake George
            • Captain's Flat
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 637.
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 637.
    Austria
     
    • Carinthia
      • Hohe Tauern
        • Ankogel group
          • Ankogel area
    G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
        • Goldberg group
          • Innerfragant
    Feitzinger, G. (1992) Gold-Silber-Vererzungen und historischer Bergbau im Zirknitz- und Wurtental (Sonnblickgruppe, Hohe Tauern, Kärnten). Lapis, 17 (5), 13-30.
              • Alteck
    G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    China
     
    • Jiangxi Province
      • Ganzhou Prefecture
        • Anyuan Co.
    Yingchen Ren, Minqing Cheng, and Cunchang Wang (1986): Mineral Deposits 5(2), 63-74
    Hungary
     
    • Heves Co.
      • Mátra Mtns
        • Gyöngyössolymos
    Szakáll-Gatter-Szendrei:Hungarian Mineral Species,2005
    Slovakia
     
    • Banská Bystrica Region
      • Poltár Co.
        • Kokava nad Rimavicou
    Ferenc Š, Bakoš F.,2006: Au-Bi-Te mineralizácia v sineckej astrižnej zóne (Kokava nad Rimavicou) – nový typ mineralizácie v Západných Karpatoch. Min.Slovaca, 38, 223-240
      • Rimavská Sobota Co.
    Bakoš F., Ferenc Š., Hraško Ľ.,2006: Nový výskyt hydrotermálnej Au-Bi-Te mineralizácie v oblasti Krokavy (Slovenské Rudohorie, veporikum). Min.Slovaca, 38, 241-252
      • Žarnovica Co.
    Sejkora J., Litochleb J., Černý P., Ozdín D., 2006: Bi-Te minerálna asociácia zo Župkova (Vtáčnik, Slovenská republika). Mineralia Slovaca, 36, 3-4, 303-315.
    USA
     
    • Arizona
      • Cochise Co.
        • Tombstone Hills
          • Tombstone District
    Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 6.
    • Colorado
      • Boulder Co.
        • Gold Hill District
    Minerals of Colorado (1997) E.B. Eckels
    • Montana
      • Silver Bow Co.
    American Journal of Science (1868): 95: 318; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 637.; USGS Bull 574
    Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
    • Nevada
      • Lander Co.
    NBMG Spec. Pub. 31 Minerals of Nevada
        • Lewis District
    NBMG Spec. Pub. 31 Minerals of Nevada
    • New Mexico
      • Doña Ana Co.
        • Organ Mts
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 637; Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996).
            • Memphis Mine
    Minerals of New Mexico 3rd ed.; American Mineralogist (1937) 22: 1065-1069.
    • North Carolina
      • Burke Co.
        • Brindletown
    Rocks & Min.:60:86.
      • Davidson Co.
    Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1076.; Genth F A (1868) Contributions to mineralogy - No. VII, The American Journal of Science and Arts, 95, 305-321
    Genth,F.A and Kerr,W.C,1881,Minerals and Mineral Localities of North Carolina,Geologic Survey
    Genth,F.A and Kerr,W.C,1881,Minerals and Mineral Localities of North Carolina,Geologic Survey
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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