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Khibinskite (Khibinskit)

Collectors Summary

Color weiß, hellgelb, farblos
Streak color weiß
Hardness (Mohs) 5
Crystal System monoklin, C2, Cm, C2/m

Chemism

Chemical formula

K2ZrSi2O7

Chemical composition

Silicium, Zirconium, Kalium, Sauerstoff

Unit weight: 337.58789 u; Number of atoms in the formula: 12

Info

Empirical formula:

K2ZrSi2O7

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

33.18

7

58.33

15.9994300

111.9960100
Silicon

Si

16.64

2

16.67

28.0855300

56.1710600
Potassium

K

23.16

2

16.67

39.0983100

78.1966200
Zirconium

Zr

27.02

1

8.33

91.2242000

91.2242000

Analysis wt%

SiO2 : 33.80, ZrO2 : 37.80, TiO2 : 0.60, K2O : 27.00 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 74)

Strunz 9th edition incl. updates

9.BC.10

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
C: Si2O7 Gruppen, ohne nicht-tetrahedrale Anionen; Kationen in oktahedraler [6] und/oder anderer Koordination
10:Keldyshit-Gruppe

Lapis Classification

VIII/C.04-030

VIII: SILIKATE
C: Gruppensilikate
4: Gruppensilikate [Si2O7] 6-, ohne tetraederfremde Anionen

Classification by Hölzel

9.BB.560

9: SILICATES
B: Sorosilicates
B: Melilite-Group

Dana 8th edition

55.02.02.02

55: Sorosilicate Minerals
02: Sorosilicates Sorosilicate Si2O7 Groups, Generally with No Additional Anions with cations in [6] coordination
02: Keldyshite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß, hellgelb, farblos

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.050
Birefringence chart\! Khibinskite title=Birefringence chart Khibinskite

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

1.665

RI value β

1.715

RI value γ / ε

1.715

Ri mean

1.698

2V angle

Biaxial (-) 11°

Optical Data Luminescence

Color SW-UV (254nm)

  

blau

SW-UV Other Colors

  

gelblich weiß

Most Common Activator

nIllegal character “<” in page name.-Gruppe

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2, m, 2/m

Space Group number

5, 8, 12

Space Group

C2, Cm, C2/m

Cell parameters a (Å)

19.22

Cell parameters b (Å)

11.10

Cell parameters c (Å)

14.10

Cell parameters a/b or c/a

1.732

Cell parameters c/b

1.270

Cell parameters α

90°

Cell parameters β

116.50

Cell parameters γ

90°

Z

16

Volumne (ų)

2692.072

X-Ray Powder Diffraction

4.27(40),
2.95(70),
2.76(100),
2.133(50),
1.630(60),
1.595(40),
1.381(50),
1.252(40)
XRD chart Khibinskite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.3 - 3.4 / Durchschnittlich = 3.34

3.332 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Hackman-Tal

Preface

Author (Name, Year)

Khomyakov & Voronkov & Lebedeva & Bykov & Yurkina, 1974

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 103 (1974), 110

Other languages

German

Khibinskit

Spanish

Khibinskita

French

Khibinskite

English

Khibinskite

Russian

Хибинскит

CNMNC (IMA)-Number

IMA 1973-014

CNMNC symbol

Symbol

Khi

Locations with GPS information