Clinomimetite Mineral Data
General Clinomimetite Information
Chemical Formula:
Pb5(AsO4)3Cl
Composition:
Molecular Weight = 1,488.21 gm
Arsenic 15.10 % As 23.17 % As2 O5
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 )3 Cl
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 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 - Prismatic H-M Symbol (2/m) Space Group: P 21 /b
X Ray Diffraction:
By Intensity(I/Io ): 3.06(1), 3.01(0.95), 2.96(0.65),
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:
PEClinomimetite =1,290.30 barns/electronU=PEClinomimetite x r Electron 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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Clinomimetite
Pb5(AsO4)3Cl
Dana No: 41.08.06.01 Strunz No: 08.BN.05
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