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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. | ||
| Name Pronunciation: |
Daubreeite + Pronunciation  |
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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 | ||
| Diaphaneity: |
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 Ncalc = 2.11 - 2.29 |
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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: |
Bulk Density (Electron Density)=5.38 gm/cc note: Specific Gravity of Daubreeite =6.50 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0000469892 Boson Index = 0.9999530108 |
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| Photoelectric: |
PEDaubreeite =1,617.44 barns/electron U=PEDaubreeite x rElectron Density=8,704.97 barns/cc. |
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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: |
10.02.01.03 (10)Oxyhalides and Hydroxyhalides | ||
| (10.02)where A (O,OH) Xq | |||
| (10.02.01)Bismoclite Group | |||
| Strunz Class: |
03.DC.25 03 - HALIDES | ||
| 03.D - Oxyhalides, Hydroxyhalides and Related Double Halides | |||
| 03.DC -With Pb (As,Sb,Bi), without Cu | |||
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 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Daubreeite using: Visit our Advertisers for Daubreeite : A Bijoux Google Search for DaubreeiteAdam's Minerals Google Search for Daubreeite Cape Minerals Google Search for Daubreeite Dakota Matrix Minerals Google Search for Daubreeite Excalibur Mineral Corp. Google Search for Daubreeite Exceptional Minerals Google Search for Daubreeite John Betts Fine Minerals Search for Daubreeite McDougall Minerals Google Search for Daubreeite Mineral News Website Link Rock and Mineral Shows Google Search for Daubreeite Weinrich Minerals, Inc. Google Search for Daubreeite Ask about Daubreeite here : Print or Cut-and-Paste your Daubreeite Specimen Label here :
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