| |
 |
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 |
| |
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 - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm |
| X Ray Diffraction: |
By Intensity(I/Io): 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: |
PEChegemite = 6.35 barns/electron
U=PEChegemite 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 :
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
Espaņol
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:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.