Leningradite Mineral Data
General Leningradite Information
Chemical Formula:
PbCu++3(VO4)2Cl2
Composition:
Molecular Weight = 698.62 gm
Vanadium 14.58 % V 26.03 % V2 O5
Copper 27.29 % Cu 34.16 % CuO
Lead 29.66 % Pb 31.95 % PbO
Chlorine 10.15 % Cl 10.15 % Cl
- %
Cl -2.29 % -O=Cl2
Oxygen 18.32 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
PbCu3 (VO4 )2 Cl2
Environment:
Vulcanic fumaroles.
IMA Status:
Approved IMA 1990
Locality:
Great Tolbachik fissure eruption (1975-1976), Kamchatka, Russia. Link to MinDat.org Location Data.
Name Origin:
Named for the city (Leningrad) where many vulcanic sublimates have been studied.
Name Pronunciation:
Leningradite + Pronunciation
Leningradite Crystallography
Axial Ratios:
a:b:c =0.8152:1:0.8463
Cell Dimensions:
a = 9.005, b = 11.046, c = 9.349, Z = 4; V = 929.94 Den(Calc)= 4.99
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: I bam
X Ray Diffraction:
By Intensity(I/Io ): 3.418(1), 2.763(0.95), 2.358(0.73),
Physical Properties of Leningradite
Cleavage:
{010} Perfect
Color:
Red, Reddish brown.
Density:
4.81
Diaphaneity:
Transparent
Habit:
Platy - Sheet forms (e.g. micas).
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Vitreous (Glassy)
Streak:
orange red
Optical Properties of Leningradite
Gladstone-Dale:
CI meas = -0.241 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = -0.196 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2645,KPDmeas = 0.2744,KC = 0.2211 Ncalc = 2.06 - 2.1
Optical Data:
Biaxial (-), b=2.29, g=2.35,
Calculated Properties of Leningradite
Electron Density:
Bulk Density (Electron Density)=4.47 gm/cc note: Specific Gravity of Leningradite =4.99 gm/cc.
Fermion Index:
Fermion Index = 0.06 Boson Index = 0.94
Photoelectric:
PELeningradite = 524.62 barns/electronU=PELeningradite x r Electron Density=2,345.75 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Leningradite is Not Radioactive
Leningradite Classification
Dana Class:
41.05.17.01 (41) Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
(41.05) where (A B)2 (XO4) Zq
(41.05.17) Dana Group
41.05.17.01 Leningradite PbCu3(VO4)2Cl2 I bam 2/m 2/m 2/m
Strunz Class:
08.BH.65 08 - PHOSPHATES, ARSENATES, VANADATES
08.B - Phosphates, etc. with Additional Anions, without H2O
08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
08.BH.65 Leningradite PbCu3(VO4)2Cl2 I bam 2/m 2/m 2/m
Other Leningradite Information
References:
NAME( Dana8) PHYS. PROP.(Am.Min.,V76:1435, v93:256) OPTIC PROP.(Am.Min.,Vol.76,p1435,1991)
See Also:
Links to other databases for Leningradite :
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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Leningradite
PbCu++3(VO4)2Cl2
Dana No: 41.05.17.01 Strunz No: 08.BH.65
Locality:
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