Perite Mineral Data

General Perite Information

Chemical Formula:

PbBiO2Cl

Composition:

Molecular Weight = 483.63 gm

Bismuth 43.21 % Bi 48.17 % Bi₂O₃

Lead 42.84 % Pb 46.15 % PbO

Chlorine 7.33 % Cl 7.33 % Cl

- % Cl -1.65 % -O=Cl₂

Oxygen 6.62 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbBiO₂Cl

Environment:

Fissures in skarn in a metamorphosed Fe-Mn deposit.

IMA Status:

Approved IMA 1960

Locality:

Langban, V¨armland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Per Adolf Geijer (1886-1976), Swedish economic geologist with the Geological Survey of Sweden.

Name Pronunciation:

Perite

Synonym:

ICSD 31860

PDF 13-352

Perite Image

Images:

Perite

Comments: Pale yellow scaly crystalline perite on quartz.
Location: Benson, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Perite Crystallography

Axial Ratios:

a:b:c =1.0093:1:2.2286

Cell Dimensions:

a = 5.627, b = 5.575, c = 12.425, Z = 4; V = 389.78 Den(Calc)= 8.24

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Bmmb

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

By Intensity(I/I_o): 2.86(1), 1.62(0.9), 3.77(0.8),

Crystal Structure:

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Gillberg M , Arkiv for Mineralogi och Geologi , 2 (1960) p.565-570, Perite, a new oxyhalide mineral from Langban, Sweden, Locality: Langban, Sweden

Physical Properties of Perite

Cleavage:

{???} Good

Color:

Brownish yellow, Yellow, Sulfur yellow.

Density:

8.16

Diaphaneity:

Translucent

Hardness:

3 - Calcite

Luster:

Adamantine

Streak:

yellow

Optical Properties of Perite

Gladstone-Dale:

CI meas= -0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1638,KPDmeas= 0.1654,KC= 0.1582
Ncalc = 2.29 - 2.3

Optical Data:

Biaxial (+), b=2.35

Calculated Properties of Perite

Electron Density:

Bulk Density (Electron Density)=6.75 gm/cc
note: Specific Gravity of Perite =8.24 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Perite=1,653.05 barns/electron
U=PE_Perite x rElectron Density=11153.05 barns/cc.

Radioactivity:

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

Perite Classification

Dana Class:

10.02.05.01 (10)Oxyhalides and Hydroxyhalides

(10.02)where A (O,OH) Xq

(10.02.05)Perite Series

10.02.05.01 Perite PbBiO2Cl Bmmb 2/m 2/m 2/m

10.02.05.02 Nadorite PbSbO2Cl Bmmb 2/m 2/m 2/m

Strunz Class:

03.DC.30 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

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

03.DC.30 Nadorite PbSbO2Cl Bmmb 2/m 2/m 2/m

03.DC.30 Perite PbBiO2Cl Bmmb 2/m 2/m 2/m

Other Perite Information

References:

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

See Also:

Links to other databases for Perite :
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
15 - WWW-MINCRYST

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Ask about Perite 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 Perite Specimen Label here :

Perite

PbBiO2Cl
Dana No: 10.02.05.01 Strunz No: 03.DC.30
Locality:

Notes: