Blakeite
A valid IMA mineral species - grandfathered - questionable
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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
GUID
(UUID V4):
(UUID V4):
540f1754-10f5-41f0-b59d-87e40063203a
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 |
|---|---|---|
| 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)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High
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:
Reference:
Frondel, C., Pough, F.H. (1944) Two new tellurites of iron: mackayite and blakeite, with new data on emmonsite and durdenite. American Mineralogist: 29: 211-225.
Other Language Names for Blakeite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.JM. | Rudolfhermannite | Fe(Te4+O3)3 · H2O |
| 4.JM. | Wortupaite | MgNi2+2(Te4+O3)3 · 3H2O |
| 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 | Zemannite | Mg0.5ZnFe3+(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 | Teineite | Cu2+(Te4+O3) · 2H2O |
| 4.JM.20 | Telluromandarinoite | Fe3+2Te3O9 · 6H2O |
| 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
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References for Blakeite
Reference List:
Localities for Blakeite
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 | |
| Lapis 2001 (1) |
USA | |
| Castor et al. (2004) |
| Castor et al. (2004) | |
| Palache et al. (1951) |
