Blakeite
A valid IMA mineral species - grandfathered - questionable
This page is currently not sponsored. Click here to sponsor this page.
About Blakeite
William P. Blake
Formula:
Fe3+2[TeO3]3 (?)
Colour:
Brown or dark reddish brown; golden yellow to yellowish brown and brown in transmitted light.
Lustre:
Dull
Hardness:
2 - 3
Name:
Named by Clifford Frondel and Frederick H. Pough in 1944 in honor of William Phipps Blake (1 June 1826, New York City, New York, United States - 22 May 1910, Berkeley, California, United States) geologist, mining consultant, and educator.
This page provides mineralogical data about Blakeite.
Unique Identifiers
Mindat ID:
693
Long-form identifier:
mindat:1:1:693:0
Similar Names
| Blakeite (of Dana) | A synonym of Coquimbite |
| Blockite | A synonym of Penroseite |
IMA Classification of Blakeite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
Fe3+2(Te4+O3)3
First published:
1944
Classification of Blakeite
4.JM.10
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
M : Tellurites without additional anions, with H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
M : Tellurites without additional anions, with H2O
28.3.22
28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites
28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites
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 |
|---|---|---|
| Bak | 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 Blakeite
Dull
Transparency:
Transparent
Colour:
Brown or dark reddish brown; golden yellow to yellowish brown and brown in transmitted light.
Streak:
Yellowish brown
Hardness:
2 - 3 on Mohs scale
Tenacity:
Fragile
Comment:
Greater than 3.1
Optical Data of Blakeite
Type:
Isotropic
RI values:
n = 2.16(2)
Surface Relief:
Very 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
Chemistry of Blakeite
Mindat Formula:
Fe3+2[TeO3]3 (?)
Elements listed:
Crystallography of Blakeite
Morphology:
Micro-crystalline crusts, massive.
Comment:
No Data is available
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47e : [Vanadates, chromates, manganates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Blakeite
General Appearance of Type Material:
Massive; micro-crystalline crusts.
Geological Setting of Type Material:
Oxidized zone of Au-Te deposit.
Associated Minerals at Type Locality:
Other Language Names for Blakeite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.JM. | Wortupaite | MgNi2+2(Te4+O3)3 · 3H2O |
| 4.JM. | Rudolfhermannite | Fe3+2(Te4+O3)3(H2O) |
| 4.JM.05 | Zemannite | Mg0.5ZnFe3+(Te4+O3)3 · 4.5H2O |
| 4.JM.05 | Keystoneite | Mg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2O |
| 4.JM.05 | Kinichilite | Mg0.5Mn2+Fe3+(Te4+O3)3 · 4.5H2O |
| 4.JM.05 | Ilirneyite | Mg0.5ZnMn3+(Te4+O3)3 · 4.5H2O |
| 4.JM.10 | Emmonsite | Fe3+2(TeO3)3 · 2H2O |
| 4.JM.15 | Graemite | Cu[TeO3] · H2O |
| 4.JM.20 | Telluromandarinoite | Fe3+2Te3O9 · 6H2O |
| 4.JM.20 | Teineite | Cu2+(Te4+O3) · 2H2O |
| 4.JM.25 | Millsite | Cu2+(Te4+O3) · 2H2O |
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 Blakeite
mindat.org URL:
https://www.mindat.org/min-693.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Blakeite
Localities for Blakeite
Showing 4 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.
Mexico | |
| Braith et al. (2001) |
USA | |
| Castor et al. (2004) |
| Castor et al. (2004) | |
| Palache et al. (1951) |
Quick NavTopAbout BlakeiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Geological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Mohawk Mine, Goldfield, Goldfield Mining District, Esmeralda County, Nevada, USA