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Braithwaiteite Mineral Data
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General Braithwaiteite Information
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 Chemical Formula: |
NaCu5(Ti,Sb)2O2(AsO4)4[AsO3(OH)]2•8H2O |
| Composition: |
Molecular Weight = 1,574.79 gm |
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Sodium 1.27 % Na 1.71 % Na2O |
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Titanium 2.74 % Ti 4.57 % TiO2 |
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Copper 20.86 % Cu 26.11 % CuO |
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Antimony 11.60 % Sb 13.12 % SbO |
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Arsenic 28.16 % As 43.20 % As2O5 |
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Hydrogen 1.15 % H 10.30 % H2O |
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Oxygen 34.22 % O |
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______ ______ |
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100.00 % 99.01 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.87Cu5.17Ti0.9Sb1.5O24(AsO4)0.98(AsO3OH)2�8(H2O) |
| Environment: |
Secondary mineral formed by oxidation of primary enargite by Na- and Ti-rich fluids in an arid environment. |
| IMA Status: |
Approved IMA 2006 |
| Locality: |
Veta Negra, Laurani, Bolivia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Richard Braithwaite, University of Reading, United Kingdom. |
| Synonym: |
IMA2006-050 |
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Braithwaiteite Crystallography
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| Axial Ratios: |
a:b:c =0.7114:1:1.0802 |
| Cell Dimensions: |
a = 7.0308, b = 9.8823, c = 10.6754, Z = 1; alpha = 106.973°, beta = 104.274°, gamma = 93.839° V = 685.98 Den(Calc)= 3.81 |
| Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 |
| X Ray Diffraction: |
By Intensity(I/Io): 9.825(1), 2.947(0.6), 5.887(0.5),2.442(0.3), 2.736(0.3), 3.232(0.3), 3.354(0.3), 4.635(0.3), |
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Optical Properties of Braithwaiteite
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| Optical Data: |
NCalc= 1.66 - from Gladstone-Dale relationship (KC = 0.1706) where Ncalc=Dcalc*KC+1
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Calculated Properties of Braithwaiteite
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| Electron Density: |
Bulk Density (Electron Density)=3.61 gm/cc
note: Specific Gravity of Braithwaiteite =3.85 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0037040949
Boson Index = 0.9962959051 |
| Photoelectric: |
PEBraithwaiteite = 65.68 barns/electron
U=PEBraithwaiteite x rElectron Density= 237.20 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Braithwaiteite is Not Radioactive |
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Braithwaiteite Classification
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| Dana Class: |
39.02.07.03 (39)Hydrated Acid Phosphates, etc |
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(39.02)H2 (AB)5 (XO4)4 � x(H2O) |
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(39.02.07)Lindackerite Group |
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39.02.07.01 Lindackerite CuCu4(AsO4)2(AsO3OH)2•~9(H2O) P1 1 |
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39.02.07.02 IMA2008-010! CaCu4(AsO4)2(AsO3OH)2•10H2O P1 1 |
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39.02.07.03 Braithwaiteite NaCu5(Ti,Sb)2O2(AsO4)4[AsO3(OH)]2•8H2O P1 1 |
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39.02.07.04 Veselovskyite (Zn,Cu,Co)Cu4(AsO4)2(AsO3OH)2•9H2O P1 1 |
| Strunz Class: |
08.DB.75 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.D - Phosphates, etc |
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08.DB -With only medium-sized cations, (OH, etc.):RO4 < 1:1 |
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08.DB.75 Braithwaiteite NaCu5(Ti,Sb)2O2(AsO4)4[AsO3(OH)]2•8H2O P1 1 |
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Other Braithwaiteite Information
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| References: |
NAME( AmMin, v94:561) PHYS. PROP.(AmMin, v94:561) |
| See Also: |
Links to other databases for Braithwaiteite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Braithwaiteite Specimen Label here :
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Braithwaiteite
NaCu5(Ti,Sb)2O2(AsO4)4[AsO3(OH)]2•8H2O
Dana No: 39.02.07.03 Strunz No: 08.DB.75
Locality:
Notes:
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