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Clinokurchatovite

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Klinokurchatovit
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Klinokurchatovit
farblos/weiße Aggregate von Klinokurchatovit, Sayak, Karaganda Oblast, Kasachstan; BB ~ 2 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Kasachstan/Qaraghandy oblysy (Karaganda)/Balqash/Sayak
Mineral: Clinokurchatovite
Image: 1588188004
License: Usage for Mineralienatlas project only
Klinokurchatovit

farblos/weiße Aggregate von Klinokurchatovit, Sayak, Karaganda Oblast, Kasachstan; BB 2 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-04-29
Locality: Sayak / Balqash / Qaraghandy oblysy (Karaganda) / Kasachstan

Collectors Summary

Color hellgrau
Streak color grauweiß
Hardness (Mohs) 4.5
Crystal System monoklin, P21/c

Chemism

Chemical formula

Ca(Mg,Fe2+,Mn)B2O5

Chemical composition

Calcium, Eisen, Magnesium, Mangan, Bor, Sauerstoff

Unit weight: 178.52935099 u; Number of atoms in the formula: 9

Info

Empirical formula:

Ca(Mg0.6Fe0.3Mn0.1)B2O5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Boron

B

12.11

2

22.22

10.8117000

21.6234000

Oxygen

O

44.81

5

55.56

15.9994300

79.9971500

Magnesium

Mg

8.17

0.6

6.67

24.3050600

14.5830360

Calcium

Ca

22.45

1

11.11

40.0784000

40.0784000

Manganese

Mn

3.08

0.1

1.11

54.9380499

5.4938050

Iron

Fe

9.38

0.3

3.33

55.8452000

16.7535600

Strunz 9th edition incl. updates

6.BA.10

6: Borate
B: Diborate
A: Insel (Neso)-Diborate mit Doppel-Triangeln B2(O,OH)5;2(2Δ); 2(2Δ) + OH, etc.
10:Szaibelyit-Gruppe

Lapis Classification

V/H.01-020

V: NITRATE, CARBONATE UND BORATE
H: Gruppenborate
1: Planare Gruppen [B2O5] 4- bis [B2O7] 8-

Classification by Hölzel

6.BA.140

6: Borates
B: Diborates
A: Nesodiborates with double triangles B2(O,OH)5 - 2(2P) - 2(2P)+OH, etc.
1: Suanite-Kurchatovite-Group (homeotypes)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

hellgrau

Streak color

grauweiß

max. Birefringence

0.059

Birefringence chart\! Clinokurchatovite title=Birefringence chart Clinokurchatovite

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

1.643

RI value β

1.675

RI value γ / ε

1.702

Ri mean

1.673

2V angle

Biaxial (-) 85°~

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

12.19

Cell parameters b (Å)

10.95

Cell parameters c (Å)

5.59

Cell parameters a/b or c/a

1.113

Cell parameters c/b

0.511

Cell parameters α

90°

Cell parameters β

102.0

Cell parameters γ

90°

Z

8

Volumne (ų)

729.851

X-Ray Powder Diffraction

3.361(40),
3.093(80),
3.045(100),
2.799(100),
2.586(50),
2.027(50),
1.937(80),
1.236(50)

XRD chart Clinokurchatovite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5

VHN (Hardness Vickers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.08 (gemessen)

3.249 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Malinko & Pertsev, 1983

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 112 (1983), 483

Other languages

Spanish

Clinokurchatovita

French

Clinokurchatovite

English

Clinokurchatovite

German

Klinokurchatovit

Russian

Клинокурчатовит

Simplified Chinese

斜硼镁钙石

Alternative Name

German

Clinokurchatovit

CNMNC symbol

Symbol

Ckht