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Pavlovskyite

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Formula:
Ca
 
8
(SiO
 
4
)
 
2
(Si
 
3
O
 
10
)
System:OrthorhombicColour:White
Hardness:6 - 6½
Name:Named after V.E. Pavlovsky (1901–1982), an outstanding geologist in the area of Eastern Siberia, in particular of the Baikal region.
This page provides mineralogical data about Pavlovskyite.

Classification of Pavlovskyite

IMA status:Approved 2011
mindat.org URL:http://www.mindat.org/min-41146.html
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Type Occurrence of Pavlovskyite

Co-type Localities:Birkhin (Ozernovskii) gabbro massif, Narin-Kunta, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia
Lakargi Mt., Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera), Kabardino-Balkarian Republic, Northern Caucasus Region, Russia
General Appearance of Type Material:Forms rims together with dellaite around galuskinite veins cutting calcio-olivine skarns in the Birkhin gabbro massif AND in cuspidine zones of altered carbonate xenoliths in the ignimbrites of the Upper Chegem caldera
Place of Conservation of Type Material:Fersman Mineralogical Museum of the Russian Academy of Sciences.
Catalogue no. of holotype (Birkhin): 4023/1; catalogue no. of co-type (Lakargi): 4024/1.
Geological Setting of type material:The Birkhin gabbro massif.
Altered carbonate xenoliths in the ignimbrites of the Upper Chegem caldera (North Caucasus).
Associated Minerals at type locality:
GaluskiniteDellaiteCuspidine

Physical Properties of Pavlovskyite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:White
Comment:Colourless in thin section
Streak:White
Hardness (Mohs):6 - 6½
Hardness (Vickers):VHN20=520 kg/mm2
Tenacity:Brittle
Cleavage:Poor/Indistinct
Uneven on {001}
Fracture:Irregular/Uneven
Density (measured):2.97(2) g/cm3
Density (calculated):2.997(1) g/cm3

Crystallography of Pavlovskyite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pbcn {P21/b 2/c 21/n}
Space Group Setting:Pbcn
Cell Parameters:a = 5.0849(1) Å, b = 11.4116(2) Å, c = 28.6304(8) Å
Ratio:a:b:c = 0.446 : 1 : 2.509
Unit Cell Volume:V 1662.71 ų
Z:4
X-Ray Powder Diffraction:
d-spacingIntensity
3.607 (39)
3.046 (67)
2.835 (100)
2.689 (70)
2.438 (18)
1.948 (38)
1.898 (18)
1.805 (14)

Optical Data of Pavlovskyite

Type:Biaxial (-)
RI values: nα = 1.656(2) nβ = 1.658(2) nγ = 1.660(2)
2V:Measured: 80° (5), Calculated: 89.9°
Maximum Birefringence:δ = 0.004

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v, medium

Chemical Properties of Pavlovskyite

Formula:
Ca
 
8
(SiO
 
4
)
 
2
(Si
 
3
O
 
10
)
Essential elements:Ca, O, Si
All elements listed in formula:Ca, O, Si
Analytical Data:
SiO2 (39.62)
MgO (0.05)
CaO (59.22)
MnO (0.08)
FeO (0.18)
Total (99.15)
Empirical Formula:
(Ca
 
7.99
Fe
 
0.02
Mn
 
0.01
Mg
 
0.01
)Si
 
4.99
O
 
18

Other Names for Pavlovskyite

Synonyms:
IMA2010-063
Other Languages:

Other Information

Fluorescence in UV light:Non-fluorescent.
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 Pavlovskyite

Reference List:

- +
Galuskin, E.V., Lazic, B., Savelyeva, V.B., Armbruster, T., Galuskina, I.O., Zadov, A.E., Dzierz˙anowski, P., Pertsev, N.N., and Gazeev, V.M. (2011): Pavlovskyite, IMA 2010-063. CNMNC Newsletter 8, 290; Mineralogical Magazine 75, 289-294.

Galuskin, E.V., Gfeller, F., Savelyeva, V.B., Armbruster, T., Lazic, B., Galuskina, I.O., Többens, D.M., Zadov, A.E., Dzierżanowski, P., Pertsev, N.N., M. Gazeev, V.M. (2012): Pavlovskyite Ca8(SiO4)2(Si3O10) - a new mineral of altered silicate-carbonate xenoliths from the two Russian type localities: Birkhin massif, Baikal Lake area and Upper Chegem caldera, North Caucasus. American Mineralogist, 97, 503-512.

Internet Links for Pavlovskyite

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    • Localities for Pavlovskyite

    The 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.
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    (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
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Narin-Kunta
    		Galuskin, E.V., Gfeller, F., Savelyeva, V.B., Armbruster, T., Lazic, B., Galuskina, I.O., Többens, D.M., Zadov, A.E., Dzierżanowski, P., Pertsev, N.N., M. Gazeev, V.M. (2012): Pavlovskyite Ca8(SiO4)2(Si3O10) - a new mineral of altered silicate-carbonate xenoliths from the two Russian type localities: Birkhin massif, Baikal Lake area and Upper Chegem caldera, North Caucasus. American Mineralogist, 97, 503-512.
    • Northern Caucasus Region
      • Kabardino-Balkarian Republic
        • Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera)
    		Galuskin, E.V., Gfeller, F., Savelyeva, V.B., Armbruster, T., Lazic, B., Galuskina, I.O., Többens, D.M., Zadov, A.E., Dzierżanowski, P., Pertsev, N.N., M. Gazeev, V.M. (2012): Pavlovskyite Ca8(SiO4)2(Si3O10) - a new mineral of altered silicate-carbonate xenoliths from the two Russian type localities: Birkhin massif, Baikal Lake area and Upper Chegem caldera, North Caucasus. American Mineralogist, 97, 503-512.
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