Lazarenkoite Mineral Data

General Lazarenkoite Information

Chemical Formula:

CaFe++As+++3O7•3(H2O)

Composition:

Molecular Weight = 486.73 gm

Calcium 8.23 % Ca 11.52 % CaO

Iron 11.47 % Fe 14.76 % FeO

Arsenic 46.18 % As 60.97 % As₂O₃

Hydrogen 1.24 % H 11.10 % H₂O

Oxygen 32.87 % O

______ ______

100.00 % 98.36 % = TOTAL OXIDE

Empirical Formula:

CaFe²⁺As₃O₇•3(H₂O)

Environment:

Oxidation product on skutterudite-loellingite ores.

IMA Status:

Approved IMA 1981

Locality:

Western Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Eugeni Konstatinovich Lazarenko (1912-1979), mineralogist, academician, Academy of Science, Ukraine.

Name Pronunciation:

Lazarenkoite + Pronunciation

Lazarenkoite Image

Images:

Lazarenkoite

Comments: Orange, fibrous lazarenkoite in a vug.
Location: Khovu-Asky Ni-Co Deposit, Tuva Republic, Eastern-Siberian Region, Russia. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Lazarenkoite Crystallography

Axial Ratios:

a:b:c =1.7246:1:0.6645

Cell Dimensions:

a = 21.8, b = 12.64, c = 8.4, Z = 10; V = 2,314.64 Den(Calc)= 3.49

Crystal System:

Orthorhombic Space Group: Unk

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

By Intensity(I/I_o): 8.4(1), 4.66(0.9), 11.2(0.9),

Physical Properties of Lazarenkoite

Color:

Light orange.

Density:

3.45

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

1 - Talc

Luster:

Resinous

Streak:

light yellow

Optical Properties of Lazarenkoite

Gladstone-Dale:

CI meas= -0.118 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.105 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2574,KPDmeas= 0.2604,KC= 0.233
Ncalc = 1.8 - 1.81

Optical Data:

Biaxial (-), a=1.82, b=1.92, g=1.955, bire=0.1350, 2V(Calc)=58, 2V(Meas)=30.

Pleochroism (x):

pale yellow.

Pleochroism (y):

pale brown.

Pleochroism (z):

rose brown.

Calculated Properties of Lazarenkoite

Electron Density:

Bulk Density (Electron Density)=3.31 gm/cc
note: Specific Gravity of Lazarenkoite =3.49 gm/cc.

Fermion Index:

Fermion Index = 0.0027032689
Boson Index = 0.9972967311

Photoelectric:

PE_Lazarenkoite= 36.07 barns/electron
U=PE_Lazarenkoite x rElectron Density= 119.49 barns/cc.

Radioactivity:

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

Lazarenkoite Classification

Dana Class:

07.08.03.01 (07)Multiple Oxides

(07.08)where A B (O)2ï¿½x(H2O)

(07.08.03)Dana Group

07.08.03.01 Lazarenkoite CaFeAs3O7•3(H2O) Unk Ortho

Strunz Class:

04.JC.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JC -Arsenites, antimonites, bismuthites; without additional anions, with H2O

04.JC.10 Lazarenkoite CaFeAs3O7•3(H2O) Unk Ortho

Other Lazarenkoite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Lazarenkoite :
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

Search for Lazarenkoite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Lazarenkoite :

Ask about Lazarenkoite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Lazarenkoite Specimen Label here :

Lazarenkoite

CaFe++As+++3O7•3(H2O)
Dana No: 07.08.03.01 Strunz No: 04.JC.10
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.