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Chukhrovite-(Ca)

A valid IMA mineral species
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03831550017386551051297.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
08138760017386551051495.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
04415100017399212024750.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
04755300017385781244663.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
05750780017385781857786.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
01856810017385781677480.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
03831550017386551051297.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
08138760017386551051495.jpg
Chukhrovite-(Ca)

Valvassera mine, Valganna, Varese Province, Lombardy, Italy
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About Chukhrovite-(Ca)Hide

01361290017271922198634.jpg
Russian mineralogist and geochemist Fedor Vasil’evich Chukhrov.
Formula:
Ca3Ca1.5Al2(SO4)F13 · 12H2O
Also given as Ca4.5Al2(SO4)F13 · 12H2O.
Colour:
Colorless, white
Lustre:
Vitreous
Hardness:
3½
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.


Unique IdentifiersHide

Mindat ID:
41907
Long-form identifier:
mindat:1:1:41907:3

IMA Classification of Chukhrovite-(Ca)Hide

Classification of Chukhrovite-(Ca)Hide

Strunz-mindat (2025):
3.CG.3.CG.

3 : HALIDES
C : Complex halides
G : Aluminofluorides with CO3, SO4, PO4

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
Chk-CaIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
ChkThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of Chukhrovite-(Ca)Hide

Lustre:
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:
n = 1.432(1)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Moderate

Chemistry of Chukhrovite-(Ca)Hide

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

Also given as Ca4.5Al2(SO4)F13 · 12H2O.
Element Weights:
Element% weight
F52.292 %
O21.680 %
Al11.426 %
S6.789 %
Ca6.789 %
H1.024 %

Calculated from ideal end-member formula.
Elements listed:
Al, Ca, F, H, O, S - search for minerals with similar chemistry

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.
Twinning:
Twinning along the [001] axis, with a rotation of 90 deg (iron cross law), is widespread, while spinel law twins are rare.
Comment:
Fd-3

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019596Chukhrovite-(Ca)Vignola P, Hatert F, 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 1069-10762012Val Cavallizza mine, Cuasso al Monte, Varese province, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of Chukhrovite-(Ca)Hide

Type Locality:
ⓘ Val Cavallizza mine, Cavagnano, Cuasso al Monte, Varese Province, Lombardy, Italy
General Appearance of Type Material:
Colourless to whitish, transparent to translucent, sharp octahedral crystals up to 100–150 µm diameter.
Place of Conservation of Type Material:
Museum of Natural History of Milano, Italy, catalogue number M37901.
Laboratory of Mineralogy of the University of Liege, Belgium, catalogue number 20383.
Geological Setting 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:
GypsumMarcasite
Reference:
Vignola, Pietro, Hatert, Frédéric, Bersani, Danilo, Diella, Valeria, Gentile, Paolo, Risplendente, Andrea (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 (6) 1069-1076 doi:10.1127/0935-1221/2012/0024-2247

Synonyms of Chukhrovite-(Ca)Hide

Other Language Names for Chukhrovite-(Ca)Hide

Relationship of Chukhrovite-(Ca) to other SpeciesHide

Member of:
Chukhrovite Group
Other Members of Chukhrovite Group:
Chukhrovite-(Ce)Ca3CeAl2(SO4)F13 · 12H2OIso.
Chukhrovite-(Nd)Ca3NdAl2(SO4)F13 · 12H2OIso. m3 (2/m 3) : Fd3
Chukhrovite-(Y)Ca3YAl2(SO4)F13 · 12H2OIso. m3 (2/m 3) : Fd3
MeniayloviteCa4[(SO4)(SiF6)(AlF6)]F · 12H2OIso. m3 (2/m 3) : Fd3

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Chukhrovite-(Ca) associated with PlumbojarositePb0.5Fe3+3(SO4)2(OH)6
2 photos of Chukhrovite-(Ca) associated with Limonite
1 photo of Chukhrovite-(Ca) associated with LeonardseniteMgAlF5 · 2H2O
1 photo of Chukhrovite-(Ca) associated with AnglesitePbSO4

Related Minerals - Strunz-mindat GroupingHide

3.CG.05StenoniteSr2Al(CO3)F5Mon. 2/m
3.CG.10MeniayloviteCa4[(SO4)(SiF6)(AlF6)]F · 12H2OIso. m3 (2/m 3) : Fd3
3.CG.10Chukhrovite-(Ce)Ca3CeAl2(SO4)F13 · 12H2OIso.
3.CG.10Chukhrovite-(Y)Ca3YAl2(SO4)F13 · 12H2OIso. m3 (2/m 3) : Fd3
3.CG.10Chukhrovite-(Nd)Ca3NdAl2(SO4)F13 · 12H2OIso. m3 (2/m 3) : Fd3
3.CG.15CreediteCa3Al2(SO4)(OH)2F8 · 2H2OMon. 2/m : B2/b
3.CG.20BøggilditeNa2Sr2Al2PO4F9Mon. 2/m : P21/b
3.CG.25Thermessaite-(NH4)(NH4)2AlF3(SO4)Orth. mmm (2/m 2/m 2/m) : Pbcn
3.CG.25ThermessaiteK2AlF3(SO4)Orth. mmm (2/m 2/m 2/m) : Pbcn
3.CG.30KruijeniteCa4Al4(SO4)F2(OH)16 · 2H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nnc

Fluorescence of Chukhrovite-(Ca)Hide

In UV light:
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.

Internet Links for Chukhrovite-(Ca)Hide

References 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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Austria
 
  • Carinthia
    • Sankt Veit an der Glan District
      • Guttaring
        • Waitschach
Kolitsch et al. (2013)
Germany
 
  • Saxony
    • Erzgebirgskreis
      • Annaberg-Buchholz
        • Kleinrückerswalde
Möhn
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Agios Konstantinos (Kamariza)
          • Mercati mines
Rieck et al. (2018)
Italy (TL)
 
  • Lombardy
    • Varese Province
      • Cuasso al Monte
        • Cavagnano
Williams et al. (2011) +1 other reference
      • Valganna
Mercurio et al. (2021)
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