Krivovichevite Mineral Data

General Krivovichevite Information

Chemical Formula:

Pb3[Al(OH)6](SO4)(OH)

Composition:

Molecular Weight = 872.37 gm

Aluminum 2.91 % Al 5.49 % Al₂O₃

Hydrogen 0.82 % H 7.31 % H₂O

Lead 72.20 % Pb 77.78 % PbO

Sulfur 3.79 % S 9.45 % SO₃

Oxygen 20.28 % O

______ ______

100.00 % 100.04 % = TOTAL OXIDE

Empirical Formula:

Pb_3.04Al_0.94S_1.03O_3.98(OH)_7.08

Environment:

Believed to be a low-temperature hydrothermal alteration product of galena and natrolite by oxidizing solutions. New structure type determined.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Mt. Lepkhe-Nelm, Lovozero massif, Kola Peninsula, Russia Link to MinDat.org Location Data.

Name Origin:

Named for Sergey Vladimirovich Krivovichev, Professor of mineralogy and crystallography at St. Petersburg State University.

Synonym:

IMA2004-053

Krivovichevite Crystallography

Axial Ratios:

a:c = 1:4.14389

Cell Dimensions:

a = 7.742, c = 32.082, Z = 6; V = 1,665.32 Den(Calc)= 5.22

Crystal System:

Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3c

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

By Intensity(I/I_o): 3.58(1), 2.591(0.9), 1.704(0.8),2.048(0.7), 3.1(0.6), 1.893(0.5), 2.216(0.5), 1.859(0.4),

Physical Properties of Krivovichevite

Cleavage:

None

Color:

Pale gray, Colorless.

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Habit:

Water Soluble - Water soluble mineral.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Krivovichevite

Gladstone-Dale:

CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.158,KC= 0.1564
Ncalc = 1.82

Optical Data:

Uniaxial (-), e=1.9, w=1.6-1.9, bire=0.0000-0.3000.

Calculated Properties of Krivovichevite

Electron Density:

Bulk Density (Electron Density)=4.47 gm/cc
note: Specific Gravity of Krivovichevite =5.22 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

PE_{Krivovichevite}=1,294.68 barns/electron
U=PE_{Krivovichevite} x rElectron Density=5,787.64 barns/cc.

Radioactivity:

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

Krivovichevite Classification

Dana Class:

06.04.14.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.04)containing multiple cations

(06.04.14)Dana Group

06.04.14.01 Krivovichevite! Pb3[Al(OH)6](SO4)(OH) R 3c 3m

06.04.14.02 Grandviewite! Cu3Al9(SO4)2(OH)29 P 2, Pm or P 2/m Mono

Strunz Class:

07.BC.75 07 - SULFATES (SELENATES, TELLURATES)

07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O

07.BC -With medium-sized and large cations

07.BC.75 Krivovichevite! Pb3[Al(OH)6](SO4)(OH) R 3c 3m

Other Krivovichevite Information

References:

NAME( AmMin, v92:1777) PHYS. PROP.(AmMin, v92:1777; CanMin v47:153) OPTIC PROP.(AmMin, v92:1777)

See Also:

Links to other databases for Krivovichevite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Krivovichevite

Pb3[Al(OH)6](SO4)(OH)
Dana No: 06.04.14.01 Strunz No: 07.BC.75
Locality:

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