Brumadoite
A valid IMA mineral species
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About Brumadoite
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
GUID
(UUID V4):
(UUID V4):
48289a32-8387-48c2-b6bc-1d0f28f81b3e
IMA Classification of Brumadoite
Approved
Approval year:
2008
First published:
2008
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 |
---|---|---|
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
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) |
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, V, 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: 1201-1205.
Synonyms of Brumadoite
Other Language Names for Brumadoite
Simplified Chinese:布水碲铜石
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+3(SO4)O2 |
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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Please feel free to link to this page.
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References for Brumadoite
Reference List:
Localities for Brumadoite
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).
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.
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