Brumadoite
A valid IMA mineral species
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About Brumadoite
Flag of Brumado, Brazil
Formula:
Cu3(Te6+O4)(OH)4 · 5H2O
Colour:
blue
Lustre:
Vitreous
Hardness:
1
Specific Gravity:
4.768 (Calculated)
Crystal System:
Monoclinic
Name:
Name is for the type locality, Brumado, Bahia, Brazil.
Type Locality:
Crystal structure unknown; presence of tellurate(VI) deduced from microchemical test with the use of KI.
Chemically related to frankhawthorneite and xocomecatlite (both anhydrous); also similar to jensenite and tellurate(IV) minerals cesbronite, graemite, millsite, and teineite.
Chemically related to frankhawthorneite and xocomecatlite (both anhydrous); also similar to jensenite and tellurate(IV) minerals cesbronite, graemite, millsite, and teineite.
Unique Identifiers
Mindat ID:
38827
Long-form identifier:
mindat:1:1:38827:8
IMA Classification of Brumadoite
Approved
IMA Formula:
Cu2+3Te6+O4(OH)4·5H2O
Approval year:
2008
First published:
2008
Type description reference:
Atencio, D., Roberts, A. C., Matioli, P. A., Stirling, J. A. R., Venance, K. E., Doherty, W., Stanley, C. J., Rowe, R., Carpenter, G. J. C., Coutinho, J. M. V. (2008) Brumadoite, a new copper tellurate hydrate, from Brumado, Bahia, Brazil. Mineralogical Magazine, 72 (6). 1201-1205 doi:10.1180/minmag.2008.072.6.1201
Classification of Brumadoite
7.BB.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
B : With medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
B : With medium-sized cations
33.1.6.
33 : SELENATES AND TELLURATES
1 : (AB)m(XO4)pZq
33 : SELENATES AND TELLURATES
1 : (AB)m(XO4)pZq
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 |
|---|---|---|
| Bmd | 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 Brumadoite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Blue
Comment:
~ RHS 114B
Streak:
Pale blue
Hardness:
1 on Mohs scale
Hardness Data:
Could not be measured
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
not observed
Fracture:
Irregular/Uneven
Density:
4.768 g/cm3 (Calculated)
Chemistry of Brumadoite
Mindat Formula:
Cu3(Te6+O4)(OH)4 · 5H2O
Element Weights:
Elements listed:
Crystallography of Brumadoite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 8.629 Å, b = 5.805 Å, c = 7.654 Å
β = 103.17°
β = 103.17°
Ratio:
a:b:c = 1.486 : 1 : 1.319
Unit Cell V:
373.3 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.432 Å | (100) |
| 3.162 Å | (66) |
| 2.385 Å | (27) |
| 2.291 Å | (12) |
| 1.916 Å | (11) |
| 1.666 Å | (14) |
| 1.452 Å | (10) |
| 1.450 Å | (10) |
Reference:
Atencio, D., Roberts, A. C., Matioli, P. A., Stirling, J. A. R., Venance, K. E., Doherty, W., Stanley, C. J., Rowe, R., Carpenter, G. J. C., Coutinho, J. M. V. (2008) Brumadoite, a new copper tellurate hydrate, from Brumado, Bahia, Brazil. Mineralogical Magazine, 72 (6). 1201-1205 doi:10.1180/minmag.2008.072.6.1201
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Brumadoite
General Appearance of Type Material:
microcrystalline aggregates. Crystals are play, subhedral, 1 - 2 microns in size. Also pseudomorphoses after magnesite.
Place of Conservation of Type Material:
Holotype material, part in Museu de Geociencias, Instituto de Geociencias, Universidade de Sao Paulo, Sao Paulo, Brazil (cat. no . DR679) and part in Museu Jose Bonifacio de Andrada e Silva, Santos, Brazil
Associated Minerals at Type Locality:
Reference:
Atencio, D., Roberts, A. C., Matioli, P. A., Stirling, J. A. R., Venance, K. E., Doherty, W., Stanley, C. J., Rowe, R., Carpenter, G. J. C., Coutinho, J. M. V. (2008) Brumadoite, a new copper tellurate hydrate, from Brumado, Bahia, Brazil. Mineralogical Magazine, 72 (6). 1201-1205 doi:10.1180/minmag.2008.072.6.1201
Synonyms of Brumadoite
Other Language Names for Brumadoite
Common Associates
Related Minerals - Strunz-mindat Grouping
| 7.BB. | Iskandarovite | Sb6O7(SO4)2 |
| 7.BB. | Novikovite | (NH4)4Mo6+2Mo5+2O8(SO4)5 |
| 7.BB.10 | Hauckite | Fe3+3(Mg,Mn2+)24Zn18(SO4)4(CO3)2(OH)81 |
| 7.BB.15 | Antlerite | Cu3(SO4)(OH)4 |
| 7.BB.20 | Dolerophanite | Cu2(SO4)O |
| 7.BB.25 | Brochantite | Cu4(SO4)(OH)6 |
| 7.BB.25 | Ramaccioniite | Cu4[SeO4](OH)6 |
| 7.BB.30 | Vergasovaite | Cu3(SO4)(MoO4,SO4)O |
| 7.BB.30 | Cupromolybdite | Cu3O(MoO4)2 |
| 7.BB.35 | Klebelsbergite | Sb4O4(SO4)(OH)2 |
| 7.BB.35 | Tavagnascoite | Bi4O4(SO4)(OH)2 |
| 7.BB.40 | Schuetteite | Hg2+3O2(SO4) |
| 7.BB.45 | Paraotwayite | Ni(OH)2-x(SO4,CO3)0.5x |
| 7.BB.50 | Xocomecatlite | Cu3(TeO4)(OH)4 |
| 7.BB.55 | Pauflerite | (V4+O)SO4 |
| 7.BB.60 | Grandviewite | Cu3Al2(SO4)(OH)10 · H2O |
| 7.BB.65 | Timroseite | Pb2Cu5(TeO6)2(OH)2 |
| 7.BB.70 | Glikinite | Zn3O(SO4)2 |
| 7.BB.80 | Mojaveite | Cu6[Te6+O4(OH)2](OH)7Cl |
| 7.BB.85 | Paratimroseite | Pb2Cu4(TeO6)2(H2O)2 |
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 Brumadoite
mindat.org URL:
https://www.mindat.org/min-38827.html
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References for Brumadoite
Reference List:
Atencio, D., Roberts, A. C., Matioli, P. A., Stirling, J. A. R., Venance, K. E., Doherty, W., Stanley, C. J., Rowe, R., Carpenter, G. J. C., Coutinho, J. M. V. (2008) Brumadoite, a new copper tellurate hydrate, from Brumado, Bahia, Brazil. Mineralogical Magazine, 72 (6). 1201-1205 doi:10.1180/minmag.2008.072.6.1201
Localities for Brumadoite
Showing 1 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.
Brazil (TL) | |
| Atencio et al. (2008) |
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Pedra Preta pit, Serra das Éguas, Brumado, Bahia, Brazil