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Carbokentbrooksite (Carbokentbrooksit)

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Carbokentbrooksit
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Carbokentbrooksit
rötlichbraunes Aggregat von Carbokentbrooksit, Dara-i-Pioz Gletscher, Tien-Shan, Tadschikistan; BB ~ 5 mm, analysiert
Copyright: mintreasure.com; Contribution: openpit
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Carbokentbrooksite
Image: 1647163805
License: Usage for Mineralienatlas project only
Carbokentbrooksit

rötlichbraunes Aggregat von Carbokentbrooksit, Dara-i-Pioz Gletscher, Tien-Shan, Tadschikistan; BB 5 mm, analysiert
Copyright: mintreasure.com
Contribution: openpit 2022-03-13
Locality: Dara-i-Pioz (Darai-Pioz) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij) / Tadschikistan

Collectors Summary

Color gelb
Streak color weiß
Hardness (Mohs) 5
Cleavages keine
Fracture muschelig
Crystal System trigonal, R3m

Chemism

Chemical formula

Na11-12(Na,Ce)3Ca6Mn3Zr3Nb[(OH)3|CO3|(Si3O9)2|(Si9O27)2·SiO]·H2O

Chemical composition

Calcium, Cerium, Mangan, Natrium, Niob, Silicium, Zirconium, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 3192.20311195 u; Number of atoms in the formula: 138.5

Info

Empirical formula:

Na11.5(Na0.75Ce0.25)3Ca6Mn3Zr3Nb[(OH)3CO3(Si3O9)2(Si9O27)2·SiO]·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.16

5

3.61

1.0079470

5.0397350
Carbon

C

0.38

1

0.72

12.0107800

12.0107800
Oxygen

O

40.10

80

57.76

15.9994300

1,279.9544000
Sodium

Na

9.90

13.75

9.93

22.9897702

316.1093403
Silicon

Si

22.00

25

18.05

28.0855300

702.1382500
Calcium

Ca

7.53

6

4.33

40.0784000

240.4704000
Manganese

Mn

5.16

3

2.17

54.9380499

164.8141497
Zirconium

Zr

8.57

3

2.17

91.2242000

273.6726000
Niobium

Nb

2.91

1

0.72

92.9063820

92.9063820
Cerium

Ce

3.29

0.75

0.54

140.1161000

105.0870750

Analysis wt%

Ø SiO2 : 45.55, Nb2O5 : 3.55, ZrO2 : 11.07, TiO2 : 0.41, FeO : 2.22, MnO : 5.41, Y2O3 : 0.43, La2O3 : 1.79, Ce2O3 : 2.97, Nd2O3 : 0.76, CaO : 10.61, SrO : 1.42, Na2O : 10.17, K2O : 0.51, CO2 : 0.78, H2O : 1.18, Ln2O3 : 6.19 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2003)

Strunz 9th edition incl. updates

9.CO.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
O: ~[Si9O27]18- neuner-Ringe
10:Eudialyt-Gruppe

Lapis Classification

VIII/E.25-032

VIII: SILIKATE
E: Ringsilikate
25: Neunerringe + Dreierringe; Eudialyt-Gruppe

Classification by Hölzel

9.CG.260

9: SILICATES
C: Cyclosilicates
G: ~[Si3O9]6-- + ~[Si9O27]18--Rings Eudialyte-Group
2: Eudialyte-Subgroup - c=30, Mn- Series

Dana 8th edition

64.01.01.12

64: Cyclosilicates Cyclosilicates
01: Cyclosilicates Cyclosilicates Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types
01: Eudialyte Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Eudialyte group

Optical Properties

Color

gelb

Streak color

weiß

max. Birefringence

0.010
Birefringence chart\! Carbokentbrooksite title=Birefringence chart Carbokentbrooksite

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

1.645

RI value γ / ε

1.635

Ri mean

1.642

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

14.239

Cell parameters b (Å)

-

Cell parameters c (Å)

30.039

Cell parameters a/b or c/a

2.110

Cell parameters c/b

-

Z

3

Volumne (ų)

5274.425

X-Ray Powder Diffraction

6.39(20),
4.30(20),
3.204(40),
3.155(30),
3.019(30),
2.970(80),
2.849(100),
2.590(30)
XRD chart Carbokentbrooksite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.14

3.015 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)

Preface

Author (Name, Year)

Khomyakov & Dusmatov & Ferraris & Gula & Ivaldi & Nechelyustov, 2003

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 132 (2003) (5), 40

IMA group assignments

Other languages

German

Carbokentbrooksit

Spanish

Carbokentbrooksita

English

Carbokentbrooksite

French

Carbokentbrooksite

Russian

Карбокентбруксит

Traditional Chinese

碳鈮異性石

Simplified Chinese

碳铌异性石

CNMNC (IMA)-Number

IMA 2002-056

CNMNC symbol

Symbol

Cktb

Locations with GPS information