Bismoclite Mineral Data

Bismoclite Mineral Data +

We specialise in top quality, fine minerals from Morocco, Namibia,
South Africa, Pakistan, Democratic Republic of Congo (ZaÃƒï¿½Ã‚Â¯re) and China
Worldwide Fine Minerals by B & C GOBIN

General Bismoclite Information

Chemical Formula:

BiOCl

Composition:

Molecular Weight = 260.43 gm

Bismuth 80.24 % Bi 89.46 % Bi₂O₃

Chlorine 13.61 % Cl 13.61 % Cl

- % Cl -3.07 % -O=Cl₂

Oxygen 6.14 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BiOCl

Environment:

In an alluvial specimen, found near bismuth-bearing granite pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1935

Locality:

In South Africa, about 25 km northwest of Jackals Water, near Steinkoph, Cape Province. Link to MinDat.org Location Data.

Name Origin:

In allusion to its composition, a "bismuth oxychloride."

Synonym:

ICSD 74502

PDF 6-249

Bismoclite Image

Images:

Bismoclite

Comments: Opaque white pearly crystalline bismoclite on matrix.
Location: Falcacci Mine, Rio Marina, Elba, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismoclite Crystallography

Axial Ratios:

a:c = 1:1.89209

Cell Dimensions:

a = 3.883, c = 7.347, Z = 2; V = 110.78 Den(Calc)= 7.81

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.44(1), 2.677(0.95), 2.753(0.75),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Keramidas K G , Voutsas G P , Rentzeperis P I , Zeitschrift fur Kristallographie , 205 (1993) p.35-40, The crystal structure of BiOCl, Locality: synthetic

View Additional jPOWD Structure files for Bismoclite
[1]

Physical Properties of Bismoclite

Cleavage:

[001] Perfect

Color:

Brown, Colorless, Gray, Yellow, Yellow brown.

Density:

7.717

Diaphaniety:

Transparent to Translucent

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Bismoclite

Gladstone-Dale:

CI meas= 0.258 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.267 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1319,KPDmeas= 0.1335,KC= 0.1799

Optical Data:

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

Calculated Properties of Bismoclite

Electron Density:

r_electron=6.40 gm/cc
note: r_Bismoclite=7.72 gm/cc.

Fermion Index

Fermion Index = 0.00003
Boson Index = 0.99997

Photoelectric:

PE_Bismoclite=1,558.04 barns/electron
U=PE_Bismoclite x r_electron=9,972.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bismoclite is Not Radioactive

Bismoclite Classification

Dana Class:

10.2.1.2 (10)Oxyhalides and Hydroxyhalides

(10.2)where A (O,OH) Xq

(10.2.1)Dana Group

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

Strunz Class:

III/D.10-80 III - Halogenides

III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds

III/D.10 - Cotunnite - Matlockite series

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

Other Bismoclite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Bismoclite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bismoclite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Bismoclite Mineral Data :

Ask about Bismoclite 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 Bismoclite Specimen Label here :

Bismoclite

BiOCl
Dana No: 10.2.1.2 Strunz No: III/D.10-80
Locality:

Notes: