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Chukhrovite-(Ca)

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Russian mineralogist and geochemist Fedor Vasil’evich Chukhrov.
Formula:
Ca4.5Al2(SO4)F13·12H2O
Colour:
Colorless, white
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.23 (Calculated)
Crystal System:
Isometric
Name:
Named in 2011 by P. Vignola, F. Hatert, Olaf Medenbach, D. Bersani, V. Diella, P. Gentile, and A. Risplendente in honor of Fedor Vasil'evich Chukhrov and for its being the Ca analogue of chukrovite-(Ce).
Very closely related to meniaylovite.


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Classification of Chukhrovite-(Ca)Hide

Approved
Approval Year:
2011

Physical Properties of Chukhrovite-(Ca)Hide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless, white
Streak:
White
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Without a distinct cleavage.
Density:
2.23 g/cm3 (Calculated)

Optical Data of Chukhrovite-(Ca)Hide

Type:
Isotropic
RI values:

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n = 1.432(1)
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
Moderate

Chemical Properties of Chukhrovite-(Ca)Hide

Formula:
Ca4.5Al2(SO4)F13·12H2O
IMA Formula:
Ca3Ca1.5Al2(SO4)F13 · 12H2O

Crystallography of Chukhrovite-(Ca)Hide

Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Fd3
Cell Parameters:
a = 16.749(1) Å
Unit Cell V:
4698.6 ų
Z:
8
Morphology:
Sharp octahedra up to 150 µm in diameter.
Comment:
Fd-3

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.665 (100)
5.921 (31)
5.053 (16)
4.190 (10)
3.226 (15)
2.556 (10)
2.182 (12)
1.915 (17)

Type Occurrence of Chukhrovite-(Ca)Hide

General Appearance of Type Material:
Found as low temperature hydrothermal crystallizations covering the surfaces of brittle fractures crosscutting a marcasite and REE-bearing fluorite vein.
Associated Minerals at Type Locality:

Synonyms of Chukhrovite-(Ca)Hide

Other Language Names for Chukhrovite-(Ca)Hide

Relationship of Chukhrovite-(Ca) to other SpeciesHide

Other Members of this group:
Chukhrovite-(Ce)Ca3(Ce,Y)[F|SO4|(AlF6)2] · 10H2OIso.
Chukhrovite-(Nd)Ca3(Nd,Y)Al2(SO4)F13·12H2OIso. m3 (2/m 3) : Fd3
Chukhrovite-(Y)Ca3(Y,Ce)[F|SO4|(AlF6)2] · 10H2OIso.
MeniayloviteCa4[F|SO4|SiF6|AlF6] · 12H2OIso. m3 (2/m 3) : Fd3

Common AssociatesHide

Associated Minerals Based on Photo Data:
Plumbojarosite2 photos of Chukhrovite-(Ca) associated with Plumbojarosite on mindat.org.
Limonite2 photos of Chukhrovite-(Ca) associated with Limonite on mindat.org.
Anglesite1 photo of Chukhrovite-(Ca) associated with Anglesite on mindat.org.

Fluorescence of Chukhrovite-(Ca)Hide

Non-fluorescent either under short-wave (254 nm) or long-wave (366 nm) ultraviolet light

Other InformationHide

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 Chukhrovite-(Ca)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vignola, P., Hatert, F., Medenbach, O., Bersani, D., Diella, V., Gentile, P. and Risplendente, A. (2011) Chukhrovite-(Ca), IMA 2010-081. CNMNC Newsletter No. 8, April 2011, page 294; Mineralogical Magazine, 75, 289-294.
Vignola, P., Hatert, F., Medenbach, O., Bersani, D., Diella, V., Gentile, P., Risplendente, A. (2012): Chukhrovite-(Ca), Ca4.5Al2(SO4)F13·12H2O, a new mineral species from the Val Cavallizza Pb-Zn-(Ag) mine, Cuasso al Monte, Varese province, Italy. European Journal of Mineralogy, 24, 1069-1076.
Kolitsch, U., Brandstätter, F., Schreiber, F., Fink, R. & Auer, C. (2013): Die Mineralogie der weltweit einzigartigen Schlacken von Waitschach, Kärnten. Annalen des Naturhistorischen Museums in Wien, Serie A, 115, 19-87 (in German).

Internet Links for Chukhrovite-(Ca)Hide

Localities for Chukhrovite-(Ca)Hide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Waitschach
Kolitsch, U., Brandstätter, F., Schreiber, F., Fink, R. & Auer, C. (2013): Die Mineralogie der weltweit einzigartigen Schlacken von Waitschach, Kärnten. Annalen des Naturhistorischen Museums in Wien, Serie A, 115, 19-87 (in German).
Italy (TL)
 
  • Lombardy
    • Varese Province
      • Ceresio Valley
        • Cuasso al Monte
          • Cavagnano
Vignola, P., Hatert, F., Medenbach, O., Bersani, D., Diella, V., Gentile, P. and Risplendente, A. (2011) Chukhrovite-(Ca), IMA 2010-081. CNMNC Newsletter No. 8, April 2011, page 294; Mineralogical Magazine, 75, 289-294; Vignola, P., Hatert, F., Medenbach, O., Bersani, D., Diella, V., Gentile, P., Risplendente, A. (2012): Chukhrovite-(Ca), Ca4.5Al2(SO4)F13·12H2O, a new mineral species from the Val Cavallizza Pb-Zn-(Ag) mine, Cuasso al Monte, Varese province, Italy. European Journal of Mineralogy, 24, 1069-1076.
Mineral and/or Locality  
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