Xanthiosite Mineral Data

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

Environment:

Secondary mineral in hydrothermal Ni–As–U ore deposits.

IMA Status:

Valid Species (Pre-IMA) 1869

Locality:

Johanngeorgenstadt, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for yellow and sulfur, in allusion to its distinctive sulfur-yellow color.

Name Pronunciation:

Xanthiosite + Pronunciation

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:

Bulk Density (Electron Density)=5.08 gm/cc
note: Specific Gravity of Xanthiosite =5.39 gm/cc.

Fermion Index:

Fermion Index = 0.004518596
Boson Index = 0.995481404

Photoelectric:

PE_Xanthiosite= 38.62 barns/electron
U=PE_Xanthiosite x rElectron Density= 196.28 barns/cc.

Radioactivity:

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

Xanthiosite Classification

Dana Class:

38.03.02.01 (38)Anhydrous Phosphates, etc

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

(38.03.02)Dana Group

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

Strunz Class:

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

08.A - Phosphates, etc. without additional anions, without H2O

08.AB -With medium-sized cations

08.AB.25 Xanthiosite Ni3(AsO4)2 P 2₁/a 2/m

Other Xanthiosite Information

References:

NAME( AntBidBlaNic5) 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 - 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

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

Xanthiosite

Ni3(AsO4)2
Dana No: 38.03.02.01 Strunz No: 08.AB.25
Locality:

Notes: