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Karpinskite (Karpinskit)

Additional Functions

Collectors Summary

Color farblos, grünblau, hellblau
Streak color weiß
Hardness (Mohs) 2.75

Chemism

Chemical formula

(Mg,Ni)2Si2O5(OH)2

Chemical composition

Magnesium, Nickel, Silicium, Sauerstoff, Wasserstoff

Unit weight: 235.987264 u; Number of atoms in the formula: 13

Info

Empirical formula:

(Mg0.75Ni0.25)2Si2O5(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.85

2

15.38

1.0079470

2.0158940
Oxygen

O

47.46

7

53.85

15.9994300

111.9960100
Magnesium

Mg

15.45

1.5

11.54

24.3050600

36.4575900
Silicon

Si

23.80

2

15.38

28.0855300

56.1710600
Nickel

Ni

12.44

0.5

3.85

58.6934200

29.3467100

Analysis wt%

SiO2 : 47.55, Al2O3 : 0.48, MgO : 17.56, NiO : 21.12, CaO : 0.80, H2O : 10.00 (Ref: Kora Vyv.1956)

Strunz 9th edition incl. updates

9.EC.60

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
60:Corrensit-Gruppe

Lapis Classification

VIII/H.27-140

VIII: SILIKATE
H: Schichtsilikate
27: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Serpentin-Gruppe

Classification by Hölzel

9.EF.280

9: SILICATES
E: Phyllosilicates
F: Other Micas without H2O
2: Monoclinic Balangeroite-Group

IMA status

Status fragwürdig

Optical Properties

Color

farblos, grünblau, hellblau

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.024
Birefringence chart\! Karpinskite title=Birefringence chart Karpinskite

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

1.570

RI value γ / ε

1.594

Ri mean

1.58~

2V angle

Biaxial (-) nd

Crystallography

Cell parameters α

90°

Cell parameters β

nd

Cell parameters γ

90°

X-Ray Powder Diffraction

11.00(100),
7.71(40),
4.76(40),
3.75(40),
3.32(20),
2.72(20),
2.546(30),
1.555(40)
XRD chart Karpinskite

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

Physical Properties

Hardness (Mohs)

2.75

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.53 - 2.63 / Durchschnittlich = 2.58

(Co-)Type locality

(Co-)Type locality

Russland/Ural, Föderationskreis/Swerdlowsk, Oblast (Sverdlovskaya)/Jekaterinburg/Nischni Tagil (Nizhnii Tagil)/Mednorudyanskoye Cu-Lagerstätte

Preface

Name from

Alexander Karpinski (1846–1936), Geologe, geboren in Karpinsk

Author (Name, Year)

Rukavishnikova, 1956

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 492

Other languages

German

Karpinskit

Spanish

Karpinskita

French

Karpinskite

English

Karpinskite

Alternative Name

German

Karpinskiit

Strunz, Tennyson: Mineralogische Tabellen. 8. Auflage. Geest & Portig, Leipzig 1982, S. 483 (jedoch mit L.L. Schilin, 1956 als Erstbeschreiber)

CNMNC symbol

Symbol

Kpi