Clinomimetite Mineral Data

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General Clinomimetite Information

Chemical Formula:

Pb5(AsO4)3Cl

Composition:

Molecular Weight = 1,488.21 gm

Arsenic 15.10 % As 23.17 % As₂O₅

Lead 69.61 % Pb 74.99 % PbO

Chlorine 2.38 % Cl 2.38 % Cl

- % Cl -0.54 % -O=Cl₂

Oxygen 12.90 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₅(AsO₄)₃Cl

Environment:

Secondary mineral in the oxidized zone of some base-metal deposits. Dimorphous with mimetite.

IMA Status:

Approved IMA 1991

Locality:

Johanngeorgenstadt, Saxony, Germay. Link to MinDat.org Location Data.

Name Origin:

Named for its monoclinic structure and relation to mimetite.

Synonym:

ICSD 69961

IMA1990-043

PDF 47-1808

Clinomimetite Image

Images:

Clinomimetite

Comments: Yellow crystals of clinomimetite.
Location: Johanngeorgenstadt, Erzgebirge, Saxony, Germany. Scale: Size of the largest crystal 12 mm.
© Thomas Witzke / Abraxas-Verlag

Clinomimetite Crystallography

Axial Ratios:

a:b:c =0.5001:1:0.366

Cell Dimensions:

a = 10.1891, b = 20.3723, c = 7.4564, Z = 4; beta = 119.8827° V = 1,341.99 Den(Calc)= 7.37

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/b

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

By Intensity(I/I_o): 3.06(1), 3.01(0.95), 2.96(0.65),

Crystal Structure:

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Yongshan D , Hughes J M , Moore P B , The Canadian Mineralogist , 29 (1991) p.369-376, The crystal structures of mimetite and clinomimetite, Pb5(AsO4)3Cl, Locality: Johanngeorgenstat, Erzgebirge, Sachsen, Germany

Physical Properties of Clinomimetite

Cleavage:

None

Color:

Greenish yellow, White, Wax yellow.

Density:

7.36

Diaphaneity:

Transparent to Translucent

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Subadamantine

Streak:

white

Optical Properties of Clinomimetite

Gladstone-Dale:

CI meas= -0.074 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1554,KPDmeas= 0.1556,KC= 0.1448
Ncalc = 2.07

Optical Data:

Biaxial (-), b=2.14-2.15, 2V(Meas)=8.

Calculated Properties of Clinomimetite

Electron Density:

Bulk Density (Electron Density)=6.16 gm/cc
note: Specific Gravity of Clinomimetite =7.37 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

PE_{Clinomimetite}=1,290.30 barns/electron
U=PE_{Clinomimetite} x rElectron Density=7,949.00 barns/cc.

Radioactivity:

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

Clinomimetite Classification

Dana Class:

41.08.06.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.08)where (A)5 (XO4)3 Zq

(41.08.06)Clinomimetite Group

41.08.06.01 Clinomimetite Pb5(AsO4)3Cl P 2₁/b 2/m

41.08.06.02 Apatite-(CaOH)-M! (Ca,Na)5[(P,S)O4]3(OH,Cl) P 2₁/b 2/m

Strunz Class:

08.BN.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BN -With only large cations, (OH, etc.):RO4 = 0.33:1

08.BN.05 Alforsite Ba5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite* Ca5(PO4)3(OH,F,Cl) P 6₃/m 6/m

08.BN.05 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

08.BN.05 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

08.BN.05 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 6₃/m 6/m

08.BN.05 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3

08.BN.05 Johnbaumite Ca5(AsO4)3(OH) P 6₃/m,P 6₃ Hex

08.BN.05 Apatite-(CaOH) Ca5(PO4)3(OH) P 6₃/m 6/m

08.BN.05 Apatite-(CaCl) Ca5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 6₃/m 6/m

08.BN.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

08.BN.05 Clinomimetite Pb5(AsO4)3Cl P 2₁/b 2/m

08.BN.05 Apatite-(CaF) Ca5(PO4)3F P 6₃/m 6/m

08.BN.05 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

08.BN.05 Hedyphane Ca2Pb3(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Mimetite Pb5(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

08.BN.05 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 6₃/m,P 6₃ Hex

08.BN.05 Pyromorphite Pb5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Vanadinite Pb5(VO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(CaOH)-M! (Ca,Na)5[(P,S)O4]3(OH,Cl) P 2₁/b 2/m

08.BN.05 IMA2008-068! Ca2Pb3(PO4)3F P 6₃/m 6/m

08.BN.05 Svabite Ca5(AsO4)3F P 6₃/m 6/m

08.BN.05 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

08.BN.05 Turneaureite Ca5[(As,P)O4]3Cl P 6₃/m 6/m

08.BN.05 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 6₃/m 6/m

08.BN.05 IMA2008-009! Sr5(PO4)3F P 6₃/m 6/m 2/m 2/m

08.BN.05 Hydroxylpyromorphite! Pb5(PO4)3OH P 6₃/m 6/m

Other Clinomimetite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

See Also:

Links to other databases for Clinomimetite :
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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Print or Cut-and-Paste your Clinomimetite Specimen Label here :

Clinomimetite

Pb5(AsO4)3Cl
Dana No: 41.08.06.01 Strunz No: 08.BN.05
Locality:

Notes: