Chegemite Mineral Data

(Translated by https://www.hiragana.jp/)
Chegemite Mineral Data

General Chegemite Information

Chemical Formula:

Ca7(SiO4)3(OH)2

Composition:

Molecular Weight = 590.81 gm

Calcium 47.48 % Ca 66.44 % CaO

Silicon 14.26 % Si 30.51 % SiO₂

Hydrogen 0.34 % H 3.05 % H₂O

Oxygen 37.91 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₇(SiO₄)₃(OH)₂

Environment:

Humite group

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Kabardino-Balkaria, North Caucasus, Russia Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2008-038

Search for Chegemite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Chegemite Crystallography

Axial Ratios:

a:b:c =0.4448:1:2.0672

Cell Dimensions:

a = 5.0696, b = 11.3955, c = 23.5571, Z = 4; V = 1,360.91 Den(Calc)= 2.88

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.91(1), 2.728(0.74), 3.041(0.65),2.837(0.6), 2.52(0.59), 2.557(0.43), 5.611(0.43), 3.646(0.41),

Optical Properties of Chegemite

Optical Data:

NCalc= 1.61 - from Gladstone-Dale relationship (KC = 0.2134) where Ncalc=Dcalc*KC+1

Calculated Properties of Chegemite

Electron Density:

Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Chegemite =2.88 gm/cc.

Fermion Index:

Fermion Index = 0.0074835127
Boson Index = 0.9925164873

Photoelectric:

PE_Chegemite= 6.35 barns/electron
U=PE_Chegemite x rElectron Density= 18.33 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chegemite is Not Radioactive

Chegemite Classification

Dana Class:

52.03.02c.04 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.03)with cations in [6] coordination only

(52.03.02c)Humite group (Humite series)

52.03.02c.01 Humite (Mg,Fe)7(SiO4)3(F,OH)2 P nma 2/m 2/m 2/m

52.03.02c.02 Leucophoenicite Mn7(SiO4)3(OH)2 P 2₁/a 2/m

52.03.02c.03 Manganhumite (Mn,Mg)7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

52.03.02c.04 Chegemite! Ca7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

Strunz Class:

09.AF.50 09 - SILICATES (Germanates)

09.A - Nesosilicates

09.AF -Nesosilicates with additional anions;

09.AF.50 Manganhumite (Mn,Mg)7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

09.AF.50 Humite (Mg,Fe)7(SiO4)3(F,OH)2 P nma 2/m 2/m 2/m

09.AF.50 Chegemite! Ca7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

Other Chegemite Information

See Also:

Links to other databases for Chegemite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Chegemite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Chegemite :

A Bijoux Google Search for Chegemite
Adam's Minerals Google Search for Chegemite
Cape Minerals Google Search for Chegemite
Dakota Matrix Minerals Google Search for Chegemite
Excalibur Mineral Corp. Google Search for Chegemite
Exceptional Minerals Google Search for Chegemite
John Betts Fine Minerals Search for Chegemite
McDougall Minerals Google Search for Chegemite
Mineral News Website Link
Rock and Mineral Shows Google Search for Chegemite
Weinrich Minerals, Inc. Google Search for Chegemite

Ask about Chegemite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Chegemite Specimen Label here :

Chegemite

Ca7(SiO4)3(OH)2
Dana No: 52.03.02c.04 Strunz No: 09.AF.50
Locality:

Notes: