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Pavlovskyite

Collectors Summary

Hardness (Mohs) 6 – 6.5
Crystal System orthorhombisch, Pbcn

Chemism

Chemical formula

Ca8(SiO4)2(Si3O10)

Chemical composition

Calcium, Silicium, Sauerstoff

Unit weight: 749.04459 u; Number of atoms in the formula: 31

Info

Empirical formula:

Ca8(SiO4)2(Si3O10)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

38.45

18

58.06

15.9994300

287.9897400
Silicon

Si

18.75

5

16.13

28.0855300

140.4276500
Calcium

Ca

42.80

8

25.81

40.0784000

320.6272000

Analysis wt%

SiO2 : 40.11, CaO : 59.89 (Ref: berechnet)

Strunz 9th edition incl. updates

9.BJ.

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
J: Gruppen(Soro)-Silikate mit Si3O10, Si4O11, etc. Anionen; Kationen in oktahedraler [6] und/oder größerer Koordination

Lapis Classification

VIII/C.28-040

VIII: SILIKATE
C: Gruppensilikate
28: [Si3O10] 8--Gruppen

Classification by Hölzel

9.BQ.120

9: SILICATES
B: Sorosilicates
Q: Si3O10 + SiO4-Group

IMA status

anerkannt, Jan. 2011 - CNMNC Newsletter No. 8, April 2011

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.005
Birefringence chart\! Pavlovskyite title=Birefringence chart Pavlovskyite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.655

RI value β

1.658

RI value γ / ε

1.660

Ri mean

1.658

2V angle

Biaxial (-) 80°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

60

Space Group

Pbcn

Cell parameters a (Å)

5.085

Cell parameters b (Å)

11.412

Cell parameters c (Å)

28.630

Cell parameters a/b or c/a

0.446

Cell parameters c/b

2.509

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

1661.399

Kristall structure

Struktur bestimmt; bekannte synthetische Phase, siehe E.V. Galuskin et al. (2011)

X-Ray Powder Diffraction

3.607(39), 3.046(67), 2.835(100), 2.689(70), 2.438(18), 1.948(38), 1.898(18), 1.805(14)
XRD chart Pavlovskyite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6 – 6.5

Density (g/cm³)

2.994 ( ρ calc. Mineralienatlas )

Chemical Properties and Tests

Unterscheidung vom ähnlichen Kilchoanit u.a. durch RAMAN-Spektroscopie, siehe E.V. Galuskin et al. (2012)

(Co-)Type locality

(Co-)Type locality

Russland/Sibirien, Föderationskreis/Irkutsk (Irkutskaja), Oblast/Narin-Kunta/Birkhin Gabbromassiv

Type material

Fersman Mineralogical Museum of the Russian Academy of Science, Russland

Collection number of type material

4023/1

Preface

Name from

V.E. Pavlovsky (1901–1982), einem herausragenden Geologen, der das östliche Sibirien und insbesonders die Baikal Region bearbeitete.

Author (Name, Year)

E.V. Galuskin et al. (2012)

References

Evgeny V. Galuskin, Frank Gfeller, Valentina B. Savelyeva, Thomas Armbruster, Biljana Lazic, Irina O. Galuskina, Daniel M. Többens, Aleksandr E. Zadov, Piotr Dzierzanowski, Nikolai N. Pertsev, Viktor M. Gazeev: 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 (2012) S.503-512.

CNMNC Newsletter No. 8, April 2011, page 291; Mineralogical Magazine, 75, 289-294.

Other languages

German

Pavlovskyit

English

Pavlovskyite

Russian

Павловскиит

CNMNC (IMA)-Number

IMA 2010-063

CNMNC symbol

Symbol

Pvs

Locations with GPS information