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Chvilevaite

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Formula:
Na(Cu,Fe,Zn)2S4
System:
Trigonal
Colour:
Bronze
Lustre:
Metallic
Hardness:
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

Approved
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.)
2.5.9.1

2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
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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First Recorded Occurrence of Chvilevaite

Place of Conservation of First Recorded Material:
Fernsman Museum
Year of Discovery:
1988
Geological Setting of First Recorded Material:
Hydrothermal veins

Physical Properties of Chvilevaite

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:
3.94 g/cm3 (Calculated)

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)2S4
Essential elements:
All elements listed in formula:
Common Impurities:
Ca,Mn,As

Relationship of Chvilevaite to other Species

2.FB.05CaswellsilveriteNaCrS2
2.FB.05SchöllhorniteNa0.3CrS2 · H2O
2.FB.05CronusiteCa0.2CrS2 · 2 H2O
2.FB.15Orickite2CuFeS2 · H2O
2.FB.20RasvumiteKFe2S3
2.FB.20PautoviteCsFe2S3
2.FB.25ColimaiteK3VS4
3.0.1ErditeNaFeS2 · 2H2O
3.0.2CoyoteiteNaFe3S5 · 2H2O
3.0.4RasvumiteKFe2S3
3.0.5BartoniteK6Fe20S26S
3.0.6MurunskiteK2(Cu,Fe)4S4

Other Names for Chvilevaite

Name in Other Languages:

Other Information

Health Risks:
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

Localities for Chvilevaite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
Mineral and/or Locality  
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