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Caswellsilverite

Formula:
NaCrS
 
2
System:TrigonalColour:Yellowish-grey, Grey
Lustre:MetallicHardness:2
Name:For Dr. Caswell Silver, University of New Mexico, New Mexico, USA.
This page provides mineralogical data about Caswellsilverite.

Classification of Caswellsilverite

IMA status:Approved
Strunz 8th edition ID:2/F.08-10
Nickel-Strunz 10th (pending) edition ID:2.FB.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
B : With alkalies (without Cl, etc.)
Dana 8th edition ID:2.9.17.1

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
Hey's CIM Ref.:3.8.2

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
8 : Sulphides etc. of Cr, Mo, W an Mn
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Type Occurrence of Caswellsilverite

Type Locality:Norton County meteorite, Norton Co., Kansas, USA
Year of Discovery:1982
Geological Setting of type material:Enstatite achondrite

Physical Properties of Caswellsilverite

Lustre:Metallic
Colour:Yellowish-grey, Grey
Hardness (Mohs):2

Crystallography of Caswellsilverite

Crystal System:Trigonal
Cell Parameters:a = 3.54Å, c = 19.35Å
Ratio:a:c = 1 : 5.466
Unit Cell Volume:V 210.00 ų (Calculated from Unit Cell)

Optical Data of Caswellsilverite

Type:Anisotropic
Anisotropism:Strong
Bireflectance:Strong

Chemical Properties of Caswellsilverite

Formula:
NaCrS
 
2
Essential elements:Cr, Na, S
All elements listed in formula:Cr, Na, S
Common Impurities:Fe,Ca,Mg,Mn,Ti

Relationship of Caswellsilverite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FB.05Schöllhornite
Na
 
0.3
CrS
 
2
·H
 
2
O
2.FB.05Cronusite
Ca
 
0.2
CrS
 
2
· 2 H
 
2
O
2.FB.10Chvilevaite
Na(Cu,Fe,Zn)
 
2
S
 
4
2.FB.15Orickite
2CuFeS
 
2
·H
 
2
O
2.FB.20Rasvumite
KFe
 
2
S
 
3
2.FB.20Pautovite
CsFe
 
2
S
 
3
2.FB.25Colimaite
K
 
3
VS
 
4
Related Minerals - Hey's Index Grouping:

- +
3.8.1Brezinaite
Cr
 
3
S
 
4
3.8.3Kalininite
ZnCr
 
2
S
 
4
3.8.4Daubréelite
Fe
2+
 
Cr
3+
2
S
 
4
3.8.5Heideite
(Fe,Cr)
 
1.15
(Ti,Fe)
 
2
S
 
4
3.8.6Molybdenite
MoS
 
2
3.8.7 Molybdenite-3R
MoS
 
2
3.8.8Jordisite
MoS
 
2
3.8.9Drysdallite
Mo(Se,S)
 
2
3.8.10Tungstenite
WS
 
2
3.8.12Alabandite
Mn
2+
 
S
3.8.13Hauerite
MnS
 
2
3.8.14Manganoshadlunite
(Mn,Pb,Cd)(Cu,Fe)
 
8
S
 
8

Other Names for Caswellsilverite

Synonyms:
IMA1981-012
Other Languages:
German:Caswellsilverit
Russian:Касуэллсилверит
Spanish:Caswellsilverita

Other Information

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 Caswellsilverite

Reference List:American Mineralogist: 67: 132-136.

Internet Links for Caswellsilverite

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    Localities for Caswellsilverite

    (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.
    USA
     
    • Kansas
      • Norton Co.
    		Am Min 67:132-136
    Mineral and/or Locality
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