Daubreeite Mineral Data + 
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- 10.2.1.1 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m
- 10.2.1.2 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m
- 10.2.1.3 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m
- III/D.10-10 Fiedlerite Pb3Cl4F(OH)2 P1 1
- III/D.10-20 Paralaurionite PbCl(OH) C 2/m 2/m
- III/D.10-30 Laurionite PbCl(OH) Pnam 2/m 2/m 2/m
- III/D.10-40 Cotunnite PbCl2 Pnam 2/m 2/m 2/m
- III/D.10-50 Pseudocotunnite K2PbCl4(?) P nma 2/m 2/m 2/m
- III/D.10-60 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m
- III/D.10-65 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m
- III/D.10-70 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m
- III/D.10-80 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m
- III/D.10-90 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m
- III/D.10-140 Symesite! Pb10(SO4)O7Cl4·(H2O) B1 1
General Daubreeite Information |
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 Chemical Formula: |
BiO(OH,Cl) | ||
| Composition: |
Molecular Weight = 251.21 gm | ||
| Bismuth 83.19 % Bi 92.74 % Bi2O3 | |||
| Hydrogen 0.20 % H 1.79 % H2O | |||
| Chlorine 7.06 % Cl 7.06 % Cl | |||
| - % Cl -1.59 % -O=Cl2 | |||
| Oxygen 9.55 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
BiO(OH)0.5Cl0.5 | ||
| IMA Status: |
Valid Species (Pre-IMA) 1876 | ||
| Locality: |
Constanicia mine, Tazna, Bolivia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Gabriel Auguste Daubree (1814-1896), French mineralogist and geologist. | ||
Daubreeite Image | |||
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Images:
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Daubreeite Crystallography |
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| Axial Ratios: |
a:c = 1:1.91968 | ||
| Cell Dimensions: |
a = 3.86, c = 7.41, Z = 2; V = 110.41 Den(Calc)= 7.56 | ||
| Crystal System: |
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm | ||
Physical Properties of Daubreeite |
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| Cleavage: |
[001] Perfect | ||
| Color: |
Yellow, Yellow brown, Cream white. | ||
| Density: |
6.5 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Fracture: |
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). | ||
| Habit: |
Compact - Occurs as a compact mass. | ||
| Habit: |
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite). | ||
| Habit: |
Massive - Fibrous - Distinctly fibrous fine-grained forms. | ||
| Hardness: |
2-2.5 - Gypsum-Finger Nail | ||
| Luster: |
Earthy (Dull) | ||
Optical Properties of Daubreeite |
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| Gladstone-Dale: |
CI meas= 0.069 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.2 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1362,KPDmeas= 0.1585,KC= 0.1703 |
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| Optical Data: |
Uniaxial (-), e=1.91, w=2.15, bire=0.2400. | ||
Calculated Properties of Daubreeite |
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| Electron Density: |
relectron=5.38 gm/cc |
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| Fermion Index |
Fermion Index = 0.00004 Boson Index = 0.99996 |
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| Photoelectric: |
PEDaubreeite =1,617.44 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Daubreeite is Not Radioactive |
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Daubreeite Classification |
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| Dana Class: |
10.2.1.3 (10)Oxyhalides and Hydroxyhalides | ||
| (10.2)where A (O,OH) Xq | |||
| (10.2.1)Dana Group | |||
| Strunz Class: |
III/D.10-90 III - Halogenides | ||
| III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds | |||
| III/D.10 - Cotunnite - Matlockite series | |||
Other Daubreeite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Daubreeite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Daubreeite using: Visit our Advertisers for Daubreeite : Translate Daubreeite Mineral Data : Ask about Daubreeite here : Print or Cut-and-Paste your Daubreeite Specimen Label here :
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