Vladimirite Mineral Data

Vladimirite Mineral Data +

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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)

IMA Status:

Valid Species (Pre-IMA) 1953

Locality:

Link to MinDat.org Location Data.

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.
© Minernet

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 - PrismaticH-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

Diaphaniety:

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

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:

r_electron=3.08 gm/cc
note: r_Vladimirite=3.17 gm/cc.

Fermion Index

Fermion Index = 0.00051
Boson Index = 0.99949

Photoelectric:

PE_Vladimirite= 26.57 barns/electron
U=PE_Vladimirite x r_electron= 81.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Vladimirite is Not Radioactive

Vladimirite Classification

Dana Class:

39.2.2.1 (39)Hydrated Acid Phosphates, etc

(39.2)H2 (AB)5 (XO4)4 · x(H2O)

(39.2.2)Dana Group

39.2.2.1 Vladimirite Ca5(AsO3OH)2(AsO4)2·5(H2O) P 2₁/c 2/m

39.2.2.2 Guerinite Ca5(AsO3OH)2(AsO4)2·9(H2O) P 2₁/n 2/m

Strunz Class:

VII/C.24-40 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.24 - Haidingerite - Picropharmacolite series

VII/C.24-10 Haidingerite Ca(AsO3OH)·(H2O) Pcnb 2/m 2/m 2/m

VII/C.24-20 Mcnearite NaCa5H4(AsO4)5·4(H2O) P1,P 1 Tri

VII/C.24-30 Irhtemite Ca4Mg(AsO3OH)2(AsO4)2·4(H2O) Unk Mono

VII/C.24-40 Vladimirite Ca5(AsO3OH)2(AsO4)2·5(H2O) P 2₁/c 2/m

VII/C.24-50 Ferrarisite Ca5(AsO3OH)2(AsO4)2·9(H2O) P1 1

VII/C.24-60 Guerinite Ca5(AsO3OH)2(AsO4)2·9(H2O) P 2₁/n 2/m

VII/C.24-70 Rauenthalite Ca3(AsO4)2·10(H2O) P1 1

VII/C.24-80 Phaunouxite Ca3(AsO4)·11(H2O) P1 1

VII/C.24-90 Picropharmacolite Ca4Mg(AsO3OH)2(AsO4)2·11(H2O) P1 1

Other Vladimirite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Vladimirite

Ca5(AsO3OH)2(AsO4)2·5(H2O)
Dana No: 39.2.2.1 Strunz No: VII/C.24-40
Locality:

Notes: