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Xanthiosite

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Big Photo

Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany
© Knut Eldjarn




Formula:
Ni
 
3
(AsO
 
4
)
 
2
System:MonoclinicColour:Golden yellow
Hardness:4
Name:Named in 1869 by Gilbert Joseph Adam from the Greek "xanthos", yellow, plus "thion", sulphur, alluding to its sulphur yellow color.
This page provides mineralogical data about Xanthiosite.

Classification of Xanthiosite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/A.09-40
Nickel-Strunz 10th (pending) edition ID:8.AB.25

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
Dana 7th edition ID:38.3.2.1
Dana 8th edition ID:38.3.2.1

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
3 : (AB)3(XO4)2
Hey's CIM Ref.:20.10.8

20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
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Type Occurrence of Xanthiosite

Type Locality:Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany
Year of Discovery:1858
Geological Setting of type material:As-Ni-U ore deposit
Associated Minerals at type locality:
BunseniteUraninite

Physical Properties of Xanthiosite

Lustre:Waxy, Dull, Earthy
Diaphaneity (Transparency):Translucent
Colour:Golden yellow
Hardness (Mohs):4
Hardness Data:Measured
Tenacity:Brittle
Density (measured):5.37 g/cm3
Density (calculated):5.37 g/cm3

Crystallography of Xanthiosite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Space Group Setting:P21/a
Cell Parameters:a = 10.174Å, b = 9.548Å, c = 5.766Å
β = 92.98°
Ratio:a:b:c = 1.066 : 1 : 0.604
Unit Cell Volume:V 559.36 ų (Calculated from Unit Cell)
Z:2
Morphology:Powdery
Comment:Min Mag 35:72 (1965)
X-Ray Powder Diffraction:
d-spacingIntensity
4.32 (60)
3.90 (50)
3.67 (50)
3.46 (80)
2.75 (80)
2.68 (80)
2.62 (60)
2.53 (100)
Comments:ICDD 18-874

Chemical Properties of Xanthiosite

Formula:
Ni
 
3
(AsO
 
4
)
 
2
Essential elements:As, Ni, O
All elements listed in formula:As, Ni, O

Relationship of Xanthiosite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AB.05Farringtonite
Mg
 
3
(PO
 
4
)
 
2
8.AB.10Ferrisicklerite
(Fe
3+
 
,LiMn
2+
 
)PO
 
4
8.AB.10Heterosite
(Fe
3+
 
,Mn
3+
 
)PO
 
4
8.AB.10Lithiophilite
LiMn
2+
 
PO
 
4
8.AB.10Natrophilite
NaMn
2+
 
PO
 
4
8.AB.10Purpurite
(Mn
3+
 
,Fe
3+
 
)PO
 
4
8.AB.10Sicklerite
(LiMn
2+
 
,Fe
3+
 
)PO
 
4
8.AB.10Simferite
Li(Mg,Fe
3+
 
,Mn
3+
 
)
 
2
(PO
 
4
)
 
2
8.AB.10Triphylite
LiFe
2+
 
PO
 
4
8.AB.15Sarcopside
(Fe
2+
 
,Mn
2+
 
,Mg)
 
3
(PO
 
4
)
 
2
8.AB.15Chopinite
(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
8.AB.20Beusite
(Mn
2+
 
,Fe
2+
 
,Ca,Mg)
 
3
(PO
 
4
)
 
2
8.AB.20Graftonite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
(PO
 
4
)
 
2
8.AB.30Lammerite
Cu
 
3
(AsO
 
4
)
 
2
8.AB.30IMA2009-002
Cu
 
3
(AsO
 
4
)
 
2
8.AB.35Mcbirneyite
Cu
 
3
(VO
 
4
)
 
2
8.AB.35Stranskiite
(Zn,Cu)
 
3
(AsO
 
4
)
 
2
8.AB.40Lyonsite
Cu
 
3
Fe
 
4
(VO
 
4
)
 
6
Related Minerals - Hey's Index Grouping:

- +
20.10.1Erythrite
Co
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.10.2Cobaltaustinite
CaCo(AsO
 
4
)(OH)
20.10.3Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
 · 2H
 
2
O
20.10.4β-Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
 · 2H
 
2
O
20.10.5Wendwilsonite
Ca
 
2
(Mg,Co
2+
 
)(AsO
 
4
)
 
2
 · 2H
 
2
O
20.10.6Cobaltkoritnigite
(Co,Zn)(HAsO
 
4
) · H
 
2
O
20.10.7Aerugite
Ni
 
8.5
(AsO
 
4
)
 
2
As
5+
 
O
 
8
20.10.9Annabergite
Ni
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.10.10Smolianinovite
(Co,Ni,Mg,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(AsO
 
4
)
 
4
 · 11H
 
2
O
20.10.11Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)

Other Names for Xanthiosite

Other Languages:
German:Xanthiosit
Russian:Ксантиозит
Spanish:Xanthiosita

Other Information

Fluorescence in UV light:Not fluorescent.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Xanthiosite

Reference List:

- +
Bergemann C. (1858), Ueber einige Nickelerze. Journal für Praktische Chemie [1] 75, 239-244.

Mineralogical Magazine (1965): 35: 72. (Suspected fraud regarding occurrence)

American Mineralogist (1965): 50: 2108.

Acta Crystallographica (1991): B: 457.

Internet Links for Xanthiosite

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  • Raman and XRD data at RRUFF project
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  • Xanthiosite details from Handbook of Mineralogy (PDF)
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    • Localities for Xanthiosite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Saxony
      • Erzgebirge
        • Johanngeorgenstadt District
    		C. Bergemann (1858): Ueber einige Nickelerze.- Journal für praktische Chemie [1] 75, 239-244
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Lavrion (Laurion; Laurium)
    		Rieck, B.: Lapis (1999)(7/8),68-76.
    Mineral and/or Locality
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