Xanthiosite Mineral Data

Xanthiosite Mineral Data +

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General Xanthiosite Information

Chemical Formula:

Ni3(AsO4)2

Composition:

Molecular Weight = 453.91 gm

Nickel 38.79 % Ni 49.36 % NiO

Arsenic 33.01 % As 50.64 % As₂O₅

Oxygen 28.20 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ni₃(AsO₄)₂

IMA Status:

Valid Species (Pre-IMA) 1869

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 63709

PDF 18-874

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Xanthiosite Crystallography

Axial Ratios:

a:b:c =1.0655:1:0.6038

Cell Dimensions:

a = 10.174, b = 9.548, c = 5.766, Z = 4; beta = 92.98° V = 559.36 Den(Calc)= 5.39

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 2.53(1), 2.75(0.8), 3.46(0.8),

Crystal Structure:

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Barbier J , Frampton C , Acta Crystallographica, Section B , 47 (1991) p.457-462, Structures of orthorhombic and monoclinic Ni3(AsO4)2, Locality: synthetic, Note: AnisoU s taken from ICSD

Physical Properties of Xanthiosite

Color:

Golden yellow.

Density:

5.37 - 5.47, Average = 5.42

Hardness:

4 - Fluorite

Optical Properties of Xanthiosite

Optical Data:

NCalc= 1.91 - from Gladstone-Dale relationship (KC = 0.1689) where Ncalc=Dcalc*KC+1
NCalc= 1.92 - from Gladstone-Dale relationship (KC = 0.1689) where Ncalc=Dmeas*KC+1

Calculated Properties of Xanthiosite

Electron Density:

r_electron=5.08 gm/cc
note: r_Xanthiosite=5.39 gm/cc.

Fermion Index

Fermion Index = 0.00451
Boson Index = 0.99549

Photoelectric:

PE_Xanthiosite= 38.62 barns/electron
U=PE_Xanthiosite x r_electron= 196.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Xanthiosite is Not Radioactive

Xanthiosite Classification

Dana Class:

38.3.2.1 (38)Anhydrous Phosphates, etc

(38.3)(A+ B++)3 (XO4)2

(38.3.2)Dana Group

38.3.2.1 Xanthiosite Ni3(AsO4)2 P 2₁/a 2/m

Strunz Class:

VII/A.09-40 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na

VII/A.09 - Lammerite - Xanthiosite series

VII/A.09-10 Lammerite Cu3[(As,P)O4]2 P 2₁/a 2/m

VII/A.09-20 Stranskiite Zn2Cu(AsO4)2 P1 1

VII/A.09-30 Keyite Cu3(Zn,Cu)4Cd2(AsO4)6·2(H2O) I2/a 2/m

VII/A.09-40 Xanthiosite Ni3(AsO4)2 P 2₁/a 2/m

Other Xanthiosite Information

References:

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

See Also:

Links to other databases for Xanthiosite :
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 -École des Mines de Paris

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Xanthiosite

Ni3(AsO4)2
Dana No: 38.3.2.1 Strunz No: VII/A.09-40
Locality:

Notes: