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 % As2 O5
Hydrogen 1.43 % H 12.74 % H2 O
Oxygen 39.61 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca5 (AsO3 OH)2 (AsO4 )2 •5(H2 O)
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:
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEVladimirite = 26.57 barns/electronU=PEVladimirite x r Electron 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 � 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
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Vladimirite
Ca5(AsO3OH)2(AsO4)2•5(H2O)
Dana No: 39.02.02.01 Strunz No: 08.CJ.25
Locality:
Notes:
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