Beyerite Mineral Data

General Beyerite Information

Chemical Formula:

(Ca,Pb)Bi2(CO3)2O2

Composition:

Molecular Weight = 651.84 gm

Calcium 4.61 % Ca 6.45 % CaO

Bismuth 64.12 % Bi 71.48 % Bi₂O₃

Lead 7.95 % Pb 8.56 % PbO

Carbon 3.69 % C 13.50 % CO₂

Oxygen 19.64 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca_0.75Pb_0.25Bi₂(CO₃)₂O₂

Environment:

Secondary mineral associated with bismuthite.

IMA Status:

Valid Species (Pre-IMA) 1943

Locality:

Schneeberg, Sachsen (Saxony), Germany Link to MinDat.org Location Data.

Name Origin:

Named for A. Beyer.

Name Pronunciation:

Beyerite

Synonym:

ICSD 36246

PDF 22-1067

Beyerite Image

Images:

Beyerite

Comments: Greenish yellow crusts of beyerite on pegmatite.
Location: Harding Mine, Taos County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Beyerite Crystallography

Axial Ratios:

a:b:c =0.9996:1:5.7564

Cell Dimensions:

a = 3.7729, b = 3.7742, c = 21.726, Z = 2; V = 309.37 Den(Calc)= 7.00

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: I mmm

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

By Intensity(I/I_o): 2.84(1), 1.75(0.8), 2.14(0.8),

Physical Properties of Beyerite

Cleavage:

None

Color:

Gray, Gray green, Yellow, Yellowish white, White.

Density:

6.56

Diaphaneity:

Transparent to Translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Beyerite

Gladstone-Dale:

CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.055 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1538,KPDmeas= 0.1641,KC= 0.1628
Ncalc = 2.07 - 2.14

Optical Data:

Biaxial (?), a=1.97, b=2.13, g=2.13, bire=0.1600

Calculated Properties of Beyerite

Electron Density:

Bulk Density (Electron Density)=5.59 gm/cc
note: Specific Gravity of Beyerite =6.56 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Beyerite=1,355.93 barns/electron
U=PE_Beyerite x rElectron Density=7,573.49 barns/cc.

Radioactivity:

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

Beyerite Classification

Dana Class:

16a.02.03.01 (16a)Carbonates - Hydroxyl or Halogen

(16a.02)where (A B)3 (XO3)2 Zq

(16a.02.03)Dana Group

16a.02.03.01 Beyerite (Ca,Pb)Bi2(CO3)2O2 I mmm 2/m 2/m 2/m

Strunz Class:

05.BE.35 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BE -With Pb, Bi

05.BE.35 Beyerite (Ca,Pb)Bi2(CO3)2O2 I mmm 2/m 2/m 2/m

Other Beyerite Information

References:

PHYS. PROP.(AmMin, Vol 88, p 478) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Beyerite :
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

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

Beyerite

(Ca,Pb)Bi2(CO3)2O2
Dana No: 16a.02.03.01 Strunz No: 05.BE.35
Locality:

Notes:

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