Vladimirite Mineral Data

General Vladimirite Information

Chemical Formula:

Ca5(AsO3OH)2(AsO4)2•5(H2O)

Composition:

Molecular Weight = 848.16 gm

Calcium 23.63 % Ca 33.06 % CaO

Arsenic 35.33 % As 54.20 % As₂O₅

Hydrogen 1.43 % H 12.74 % H₂O

Oxygen 39.61 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₅(AsO₃OH)₂(AsO₄)₂•5(H₂O)

Environment:

Secondary mineral in the oxidized zone of arsenic-bearing mineral deposits.

IMA Status:

Valid Species (Pre-IMA) 1953

Locality:

Vladimirovskoye cobalt deposit, Altai Mountains, and the Khovu-Aksy Ni-Co deposit, Tuva, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Vladimirite + Pronunciation

Synonym:

ICSD 100850

PDF 83-1926

Vladimirite Image

Images:

Vladimirite Sphaerocobaltite

Comments: Translucent white prismatic vladimirite microcrystals with pink sphaerocobaltite.
Location: Irhtem Mine, near Bou Azzer, Ouarzazate, Morocco. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Vladimirite

Comments: Snow white radial, acicular sprays, thick on calcite matrix.
Location: Ait Ahmane, Bou Azzer district,, Morocco. Scale: Crystal size 5 mm.
© Tom Loomis / Dakota Matrix

Images:

Vladimirite

Comments: Sprays of platy, elongated, white tiny crystals of vladimirite, associated with minor aragonite.
Location: Irhtem, Morocco. Scale: Picture size 3 cm.
© Sandro Maggia/Minernet.it

Vladimirite Crystallography

Axial Ratios:

a:b:c =0.5701:1:2.2276

Cell Dimensions:

a = 5.81, b = 10.19, c = 22.7, Z = 3; beta = 97.32° V = 1,332.98 Den(Calc)= 3.17

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 2.79(1), 4(0.8), 4.15(0.8),

Physical Properties of Vladimirite

Cleavage:

{???} Good

Color:

Colorless, White, Light pink.

Density:

3.14

Diaphaneity:

Transparent

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Vladimirite

Gladstone-Dale:

CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2067,KPDmeas= 0.2087,KC= 0.2006
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (-), a=1.65, b=1.654-1.656, g=1.661, bire=0.0110, 2V(Calc)=76-84, 2V(Meas)=70.

Calculated Properties of Vladimirite

Electron Density:

Bulk Density (Electron Density)=3.08 gm/cc
note: Specific Gravity of Vladimirite =3.17 gm/cc.

Fermion Index:

Fermion Index = 0.0005112422
Boson Index = 0.9994887578

Photoelectric:

PE_Vladimirite= 26.57 barns/electron
U=PE_Vladimirite x rElectron Density= 81.82 barns/cc.

Radioactivity:

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

Vladimirite Classification

Dana Class:

39.02.02.01 (39)Hydrated Acid Phosphates, etc

(39.02)H2 (AB)5 (XO4)4 ï¿½ x(H2O)

(39.02.02)Dana Group

39.02.02.01 Vladimirite Ca5(AsO3OH)2(AsO4)2•5(H2O) P 2₁/c 2/m

39.02.02.02 Guerinite Ca5(AsO3OH)2(AsO4)2•9(H2O) P 2₁/n 2/m

Strunz Class:

08.CJ.25 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CJ -With only large cations

08.CJ.25 Vladimirite Ca5(AsO3OH)2(AsO4)2•5(H2O) P 2₁/c 2/m

Other Vladimirite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Vladimirite :
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

Search for Vladimirite using:

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

Visit our Advertisers for Vladimirite :

Ask about Vladimirite 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 Vladimirite Specimen Label here :

Vladimirite

Ca5(AsO3OH)2(AsO4)2•5(H2O)
Dana No: 39.02.02.01 Strunz No: 08.CJ.25
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.