Daubreeite Mineral Data

General Daubreeite Information

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)_0.5Cl_0.5

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

Daubreeite Image

Images:

Daubreeite

Comments: Massive yellow daubreeite.
Location: Cerro Tazna, Atocha-Quechisla district, Nor Chichas Province, Potosí Department, Bolivia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Daubreeite Crystallography

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

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

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

Optical Data:

Uniaxial (-), e=1.91, w=2.15, bire=0.2400.

Calculated Properties of Daubreeite

Electron Density:

Bulk Density (Electron Density)=5.38 gm/cc
note: Specific Gravity of Daubreeite =6.50 gm/cc.

Fermion Index:

Fermion Index = 0.0000469892
Boson Index = 0.9999530108

Photoelectric:

PE_Daubreeite=1,617.44 barns/electron
U=PE_Daubreeite x rElectron Density=8,704.97 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Daubreeite is Not Radioactive

Daubreeite Classification

Dana Class:

10.02.01.03 (10)Oxyhalides and Hydroxyhalides

(10.02)where A (O,OH) Xq

(10.02.01)Bismoclite Group

10.02.01.01 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m

10.02.01.02 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m

10.02.01.03 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m

Strunz Class:

03.DC.25 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DC -With Pb (As,Sb,Bi), without Cu

03.DC.25 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m

03.DC.25 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m

03.DC.25 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m

03.DC.25 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m

03.DC.25 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m

03.DC.25 Zhangpeishanite! BaFCl P 4/mmm 4mm

Other Daubreeite Information

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:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Daubreeite :

A Bijoux Google Search for Daubreeite
Adam'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 :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Daubreeite Specimen Label here :

Daubreeite

BiO(OH,Cl)
Dana No: 10.02.01.03 Strunz No: 03.DC.25
Locality:

Notes: