https://www.mineralbox.biz
https://www.mineraliengrosshandel.com
https://www.mineral-bosse.de
https://www.edelsteine-neuburg.de
'._('einklappen').'
 

Chegemite

Collectors Summary

Crystal System orthorhombisch, Pbnm

Chemism

Chem­ical formula

Ca7(SiO4)3(OH)2

Addi­tional chem. informa­tion

Humit Gruppe

Chem­ical com­po­si­tion

Calcium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 590.813304 u; Number of atoms in the formula: 26

Info

Empirical formula:

Ca7(SiO4)3(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.34

2

7.69

1.0079470

2.0158940

Oxygen

O

37.91

14

53.85

15.9994300

223.9920200

Silicon

Si

14.26

3

11.54

28.0855300

84.2565900

Calcium

Ca

47.49

7

26.92

40.0784000

280.5488000

Anal­y­sis wt%

SiO2 : 30.30, CaO : 66.17, H2O : 2.26, F : 1.67 (Ref: European Journal of Mineralogy 2009)

Strunz 9th edi­tion incl. updates

9.AF.50

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
F: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in [4], [5] und/oder nur [6] Koordination
50:Humit-Gruppe

Lapis Clas­sifica­tion

VIII/B.04-095

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
4: Kationen in tetraedrischer oder oktaedrischer Koordination [4/6]; Humit-Gruppe

Clas­sifica­tion by Hölzel

9.AI.260

9: SILICATES
A: Nesosilicates
I: Nesosilicates with OH
2: Norbergite-Group

IMA sta­tus

Neue Mineralien Nov. 2008 - IMA-WEB-Seite [anerkannt]

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

max. Birefrin­gence

0.009

Birefringence chart\! Chegemite title=Birefringence chart Chegemite

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

1.621

RI value β

1.626

RI value γ / ε

1.630

Ri mean

1.626

2V angle

Biaxial (-) 80°

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pbnm

Cell param­e­ters a (Å)

5.070

Cell param­e­ters b (Å)

11.396

Cell param­e­ters c (Å)

23.557

Cell param­e­ters a/b or c/a

0.445

Cell param­e­ters c/b

2.067

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1361.07

X-Ray Pow­der Diffrac­tion

5.611(43), 3.646(41), 3.041(65), 2.837(60), 2.728(74), 2.557(43), 2.520(59), 1.910(100)

XRD chart Chegemite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.892 (berechnet)

2.883 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Evgeny V. Galuskin, 2008

References

Neue Mineralien Nov. 2008 - IMA-WEB-Seite [anerkannt]

Other languages

German

Chegemit

Spanish

Chegemita

English

Chegemite

Russian

Чегемит

CNMNC (IMA)-Number

IMA 2008-038

CNMNC symbol

Symbol

Cgm

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Chegemit
Google-Bilder-Suche - search for: Chegemit
Mineralienatlas.de (Forum) - search for: Chegemit

English pages

Mindat - search for: Chegemite
Webmineral - search for:Chegemite
Handbook-of-Mineralogy - search for: Chegemite
RRUFF - Raman, XRD and other mineral data - search for: Chegemite
RRUFF - References and PDF downloads - search for: Chegemite
American-Mineralogist-Crystal-Structure-Database - search for: Chegemite
Strahlen.org - search for: Chegemite

Russian pages

Webmineral.ru - search for: Чегемит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Chegemit
Crystal-Treasure.com - search for: Chegemit
Bosse - search for: Chegemit
Edelsteine Neuburg - Gundolf Fischer - search for: Chegemit

Locations with GPS information