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Shuvalovite

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Ivan Ivanovich Shuvalov
Formula:
K2(Ca2Na)(SO4)3F
Colour:
Colourless
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.64 (Calculated)
Crystal System:
Orthorhombic
Name:
In honour of the Russian nobleman and statesman Ivan Ivanovich Shuvalov (1727–1797), who was an enthusiastic patron of the sciences, arts and literature, and one of the founders of the Moscow University in 1755.
New structure type.

Chemically and anion-stoichiometrically similar to but structurally different from krasheninnikovite. May also be compared to cesanite (similar chemistry and anion stoichiometry) and other apatite group species (stoichiometry).

Crystal structure details (Pekov et al, 2016):
- isolated 2 nonequivalent SO4 tetrahedra
- disordered coordination of the S(2) site results in two possible orientations of the corresponding tetrahedron
- Ca(1)O7F polyhedra
- Ca(2)O5F and Ca(2)O6F polyhedra
- [9]K(1) and [9]K(2)
- most of Na resides in the Ca(2) site


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Classification of ShuvaloviteHide

Approved
Approval Year:
2014

Physical Properties of ShuvaloviteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Hardness:
Comment:
ca. 3
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.64 g/cm3 (Calculated)

Optical Data of ShuvaloviteHide

Type:
Biaxial (-)
RI values:
nα = 1.493(1) nβ = 1.498(1) nγ = 1.498(1)
2V:
Measured: ≤ 20°
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of ShuvaloviteHide

Formula:
K2(Ca2Na)(SO4)3F

Crystallography of ShuvaloviteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 13.2383(4) Å, b = 10.3023(3) Å, c = 8.9909(4) Å
Ratio:
a:b:c = 1.285 : 1 : 0.873
Unit Cell V:
1,226.22 ų (Calculated from Unit Cell)
Morphology:
Coarse lamellae or tablets, [100] flattening, rectangular, octagonal or irregular up to 0.05 x 0.7 x 0.9 mm; in aggregates

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.245(45)
3.963(62)
3.281(100)
3.210(30)
3.144(84)
3.112(67)
3.016(78)
2.785(52)
Comments:
From Type Description.

Type Occurrence of ShuvaloviteHide

General Appearance of Type Material:
crusts and open-work groups (up to 1 x 1 cm) on basalt scoria
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4549/1
Geological Setting of Type Material:
found within sublimates
Associated Minerals at Type Locality:

Synonyms of ShuvaloviteHide

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 ShuvaloviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Zubkova, N.V., Britvin, S.N., Chukanov, N.V., Yapaskurt, V.O., Sidorov, E.G. and Pushcharovsky, D.Y. (2014) Shuvalovite, IMA 2014-057. CNMNC Newsletter No. 22, October 2014, page 1246; Mineralogical Magazine, 78, 1241-1248.
Pekov, I.V., Zubkova, N.V., Britvin, S.N., Chukanov, N.V., Yapaskurt, V.O., Sidorov, E.G., Pushcharovsky, D.Y. (2016): Shuvalovite, K2(Ca2Na)(SO4)3F, a new mineral from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy: 28 (in press); http://forum.amiminerals.it/viewtopic.php?f=5&t=11957 (2016)

Internet Links for ShuvaloviteHide

Localities for ShuvaloviteHide

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.
Russia (TL)
 
  • Far-Eastern Region
    • Kamchatka Oblast'
      • Tolbachik volcano
        • Great Fissure eruption (Main Fracture)
          • Northern Breakthrough (North Breach)
            • Second scoria cone
Pekov, I.V., Zubkova, N.V., Britvin, S.N., Chukanov, N.V., Yapaskurt, V.O., Sidorov, E.G. and Pushcharovsky, D.Y. (2014) Shuvalovite, IMA 2014-057. CNMNC Newsletter No. 22, October 2014, page 1246; Mineralogical Magazine, 78, 1241-1248.
Mineral and/or Locality  
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