Brandãoite
A valid IMA mineral species
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About Brandãoite
Formula:
BeAl2(PO4)2(OH)2(H2O)5
Colour:
colorless
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
2.353 (Calculated)
Crystal System:
Triclinic
Name:
The mineral is named after Professor Paulo Roberto Gomes Brandão (born January 26, 1944), Department of Mining Engineering, Universidade Federal de Minas Gerais (UFMG). He specialises in the mineralogical characterisation of ores and in the development of improved ore-concentration techniques.
New structure type.
Name Encoding
ASCII-7:
Brandaoite
Unique Identifiers
Mindat ID:
52174
Long-form identifier:
mindat:1:1:52174:9
Similar Names
| Brandãosite | A variety of Spessartine | (Mn,Fe)4(Al,Fe)2Si4O15 |
IMA Classification of Brandãoite
Approved
IMA Formula:
BeAl2(PO4)2(OH)2(H2O)4·H2O
Approval year:
2017
First published:
2019
Type description reference:
Menezes Filho, Luiz A. D., Chaves, Mário L. S. C., Cooper, Mark A., Ball, Neil A., Abdu, Yassir A., Sharpe, Ryan, Day, Maxwell C., Hawthorne, Frank C. (2019) Brandãoite, [BeAl2(PO4)2(OH)2(H2O)4](H2O), a new Be–Al phosphate mineral from the João Firmino mine, Pomarolli farm region, Divino das Laranjeiras County, Minas Gerais State, Brazil: description and crystal structure. Mineralogical Magazine, 83 (2) 261-267 doi:10.1180/mgm.2018.121
Classification of Brandãoite
8.CA.
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
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 |
|---|---|---|
| Bdã | 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 Brandãoite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Comment:
white in aggregates
Streak:
White
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Conchoidal
Density:
2.353 g/cm3 (Calculated)
Optical Data of Brandãoite
Type:
Biaxial (+)
RI values:
nα = 1.544(2) nβ = 1.552(2) nγ = 1.568(2)
2V:
Measured: 69.7° (10), Calculated: 71.2°
Max. Birefringence:
δ = 0.024
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Chemistry of Brandãoite
Mindat Formula:
BeAl2(PO4)2(OH)2(H2O)5
Element Weights:
Crystallography of Brandãoite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.100(4) Å, b = 8.616(4) Å, c = 10.261(5) Å
α = 93.191(11)°, β = 95.120(11)°, γ = 96.863(11)°
α = 93.191(11)°, β = 95.120(11)°, γ = 96.863(11)°
Ratio:
a:b:c = 0.708 : 1 : 1.191
Unit Cell V:
532.1 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.772 Å | (82) |
| 5.243 Å | (85) |
| 4.982 Å | (73) |
| 4.268 Å | (100) |
| 3.846 Å | (48) |
| 3.091 Å | (53) |
| 2.789 Å | (68) |
| 2.712 Å | (76) |
Reference:
Menezes Filho, Luiz A. D., Chaves, Mário L. S. C., Cooper, Mark A., Ball, Neil A., Abdu, Yassir A., Sharpe, Ryan, Day, Maxwell C., Hawthorne, Frank C. (2019) Brandãoite, [BeAl2(PO4)2(OH)2(H2O)4](H2O), a new Be–Al phosphate mineral from the João Firmino mine, Pomarolli farm region, Divino das Laranjeiras County, Minas Gerais State, Brazil: description and crystal structure. Mineralogical Magazine, 83 (2) 261-267 doi:10.1180/mgm.2018.121
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Brandãoite
General Appearance of Type Material:
Acicular crystals less than 10 μm wide and less than 100 μm long that form compact radiating spherical aggregates up to 1.0-1.5 mm across.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Department of Natural History, Royal Ontario Museum, 100 Queens Park, Toronto, Ontario M5S 2C6, Canada, catalogue number M57443
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:
Reference:
Menezes Filho, Luiz A. D., Chaves, Mário L. S. C., Cooper, Mark A., Ball, Neil A., Abdu, Yassir A., Sharpe, Ryan, Day, Maxwell C., Hawthorne, Frank C. (2019) Brandãoite, [BeAl2(PO4)2(OH)2(H2O)4](H2O), a new Be–Al phosphate mineral from the João Firmino mine, Pomarolli farm region, Divino das Laranjeiras County, Minas Gerais State, Brazil: description and crystal structure. Mineralogical Magazine, 83 (2) 261-267 doi:10.1180/mgm.2018.121
Synonyms of Brandãoite
Other Language Names for Brandãoite
Dutch:Brandãoiet
German:Brandãoit
Common Associates
Associations Based on Photo Data:
| 1 photo of Brandãoite associated with Atencioite | Ca2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2O |
| 1 photo of Brandãoite associated with Mica Group | |
| 1 photo of Brandãoite associated with Ushkovite | MgFe3+2(PO4)2(OH)2 · 8H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CA. | Apexite | NaMg(PO4) · 9H2O |
| 8.CA. | Davidlloydite | Zn3(AsO4)2 · 4H2O |
| 8.CA.05 | Parafransoletite | Ca3Be2(PO4)2(PO3OH)2 · 4H2O |
| 8.CA.05 | Fransoletite | Ca3Be2(PO4)2(PO3OH)2 · 4H2O |
| 8.CA.10 | Ehrleite | Ca4Be3Zn2(PO4)6 · 9H2O |
| 8.CA.15 | Faheyite | Be2Mn2+Fe3+2(PO4)4 · 6H2O |
| 8.CA.20 | Mccrillisite | NaCs(Be,Li)Zr2(PO4)4 · 1-2H2O |
| 8.CA.20 | Gainesite | Na(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2O |
| 8.CA.20 | Selwynite | NaK(Be,Al)Zr2(PO4)4 · 2H2O |
| 8.CA.25 | Pahasapaite | Li8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O |
| 8.CA.30 | Nizamoffite | Mn2+Zn2(PO4)2(H2O)4 |
| 8.CA.30 | Arsenohopeite | Zn3(AsO4)2 · 4H2O |
| 8.CA.30 | Hopeite | ZnZn2(PO4)2 · 4H2O |
| 8.CA.35 | Warikahnite | Zn3(AsO4)2 · 2H2O |
| 8.CA.40 | Phosphophyllite | Zn2Fe 2+(PO4)2 · 4H2O |
| 8.CA.42 | Steinmetzite | Zn2Fe3+(PO4)2(OH) · 3H2O |
| 8.CA.45 | Parascholzite | CaZn2(PO4)2 · 2H2O |
| 8.CA.45 | Scholzite | CaZn2(PO4)2 · 2H2O |
| 8.CA.50 | Keyite | Cu2+3Zn4Cd2(AsO4)6 · 2H2O |
| 8.CA.55 | Pushcharovskite | K0.6Cu18[AsO2(OH)2]4[AsO3OH]10(AsO4)(OH)9.6 · 18.6H2O |
| 8.CA.60 | Prosperite | Ca2Zn4(AsO4)4 · H2O |
| 8.CA.65 | Gengenbachite | KFe3+3(PO3OH)4[PO2(OH)2]2 · 6H2O |
| 8.CA.70 | Parahopeite | Zn3(PO4)2 · 4H2O |
| 8.CA.70 | Reaphookhillite | MgZn2(PO4)2 · 4H2O |
| 8.CA.75 | Stergiouite | CaZn2(AsO4)2 · 4H2O |
| 8.CA.80 | Limousinite | BaCa[Be4P4O16] · 6H2O |
| 8.CA.85 | Minjiangite | BaBe2(PO4)2 |
| 8.CA.85 | Wilancookite | (Ba5Li2◻)Ba6Be24P24O96 · 26H2O |
Fluorescence of Brandãoite
none
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 Brandãoite
mindat.org URL:
https://www.mindat.org/min-52174.html
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References for Brandãoite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2017) New minerals and nomenclature modifications approved in 2017, CNMNC Newsletter No 39. Mineralogical Magazine, 81 (5) 1279-1286 doi:10.1180/minmag.2017.081.072
Menezes Filho, Luiz A. D., Chaves, Mário L. S. C., Cooper, Mark A., Ball, Neil A., Abdu, Yassir A., Sharpe, Ryan, Day, Maxwell C., Hawthorne, Frank C. (2019) Brandãoite, [BeAl2(PO4)2(OH)2(H2O)4](H2O), a new Be–Al phosphate mineral from the João Firmino mine, Pomarolli farm region, Divino das Laranjeiras County, Minas Gerais State, Brazil: description and crystal structure. Mineralogical Magazine, 83 (2) 261-267 doi:10.1180/mgm.2018.121
Localities for Brandãoite
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) | |
| Menezes Filho et al. (2019) |
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João Firmino claim, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil