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Chvilevaite

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Formula:
Na(Cu,Fe,Zn)
 
2
S
 
4
System:TrigonalColour:Bronze
Lustre:MetallicHardness:3
Name:Named in 1988 by V. M. Kacholovskaya, B. S. Osipov, N. G. Nazarenko, V. A. Kukoev, A. O., Mazmanyan, I. N. Egorov, and L. N. Kaplunnik in honor of Tat'iana Nikiforovna Chvileva (1925-), Russian mineralogist.
This page provides mineralogical data about Chvilevaite.

Classification of Chvilevaite

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

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:2.5.9.1

2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
Hey's CIM Ref.:3.0.3

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
0 : Sulphides etc. of the alkalis
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Type Occurrence of Chvilevaite

Type Locality:Akatui Pb-Zn deposit, Akatui, Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
Place of Conservation of Type Material:Fernsman Museum
Year of Discovery:1988
Geological Setting of type material:Hydrothermal veins
Associated Minerals at type locality:
SphaleriteQuartzPyriteGalenaCovellite
ChalcociteBoulangeriteArsenopyrite

Physical Properties of Chvilevaite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Bronze
Comment:Tarnishes sooty black
Hardness (Mohs):3
Hardness (Vickers):VHN20=110 - 153 kg/mm2
Tenacity:Brittle
Cleavage:Perfect
on {0001}
Density (calculated):3.94 g/cm3

Crystallography of Chvilevaite

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 3.873(1) Å, c = 6.848(1) Å
Ratio:a:c = 1 : 1.768
Unit Cell Volume:V 88.96 ų (Calculated from Unit Cell)
Z:1
Morphology:Tabular, prismatic and equant grains to 0.5mm

Optical Data of Chvilevaite

Type:Anisotropic
Anisotropism:Strong from black to white
Colour in reflected light:Orange changing to rosy purple with time
Pleochroism:Visible
Comments:From light orange to dark gray with violet tint.

Chemical Properties of Chvilevaite

Formula:
Na(Cu,Fe,Zn)
 
2
S
 
4
Simplified for copy/paste:Na(Cu,Fe,Zn)2S4
Essential elements:Cu, Na, S
All elements listed in formula:Cu, Fe, Na, S, Zn
Common Impurities:Ca,Mn,As

Relationship of Chvilevaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FB.05Caswellsilverite
NaCrS
 
2
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.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:

- +
3.0.1Erdite
NaFeS
 
2
· 2H
 
2
O
3.0.2Coyoteite
NaFe
 
3
S
 
5
· 2H
 
2
O
3.0.4Rasvumite
KFe
 
2
S
 
3
3.0.5Bartonite
K
 
6
Fe
 
20
S
 
26
S
3.0.6Murunskite
K
 
2
(Cu,Fe)
 
4
S
 
4

Other Names for Chvilevaite

Synonyms:
IMA1987-017
Other Languages:
German:Chvilevait
Russian:Чвилеваит
Spanish:Chvilevaita

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 Chvilevaite

Reference List:

- +
American Mineralogist: 74: 946.

V. M. Kacholovskaya, B. S. Osipov, N. G. Nazarenko, V. A. Kukoev, A. O., Mazmanyan, I. N. Egorov, and L. N. Kaplunnik (1988) Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 117(2): 204-207.

Doklady Akademii Nauk SSSR: 310: 90-93.

Internet Links for Chvilevaite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Chvilevaite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Chvilevaite

    (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.
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Chitinskaya Oblast'
          • Akatui
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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