Leningradite Mineral Data

General Leningradite Information

Chemical Formula:

PbCu++3(VO4)2Cl2

Composition:

Molecular Weight = 698.62 gm

Vanadium 14.58 % V 26.03 % V₂O₅

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)₂Cl₂

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

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

By Intensity(I/I_o): 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:

PE_Leningradite= 524.62 barns/electron
U=PE_Leningradite x rElectron 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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