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Krieselite Mineral Data
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General Krieselite Information
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 Chemical Formula: |
(Al,Ga)2(Ge,C)O4 (OH)2 |
| Composition: |
Molecular Weight = 230.81 gm |
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Aluminum 17.54 % Al 33.13 % Al2O3 |
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Gallium 15.10 % Ga 20.30 % Ga2O3 |
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Germanium 23.59 % Ge 33.99 % GeO2 |
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Hydrogen 0.87 % H 7.81 % H2O |
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Carbon 1.30 % C 4.77 % CO2 |
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Oxygen 41.59 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Al1.5Ga0.5Ge0.75C0.25O4(OH)2 |
| Environment: |
Isotypic with topaz |
| IMA Status: |
Proposed IMA 2003 (Dana # Added) |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| Synonym: |
IMA2000-043a |
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Krieselite Crystallography
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| Axial Ratios: |
a:b:c =1.0684:1:0.5636 |
| Cell Dimensions: |
a = 9.1111, b = 8.5276, c = 4.8064, Z = 4; V = 373.44 Den(Calc)= 4.10 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma |
| X Ray Diffraction: |
By Intensity(I/Io): 3.016(1), 3.811(0.78), 3.315(0.48),2.247(0.38), 1.398(0.29), 2.417(0.27), 2.464(0.24), |
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Physical Properties of Krieselite
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| Color: |
Beige, White. |
| Diaphaneity: |
Translucent |
| Luster: |
Greasy (Oily) |
| Streak: |
white |
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Optical Properties of Krieselite
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| Optical Data: |
Biaxial (?) |
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NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.1965) where Ncalc=Dcalc*KC+1
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Calculated Properties of Krieselite
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| Electron Density: |
Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Krieselite =4.10 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEKrieselite = 23.08 barns/electron
U=PEKrieselite x rElectron Density= 90.61 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Krieselite is Not Radioactive |
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Krieselite Classification
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| Dana Class: |
52.03.01.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O |
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(52.03)with cations in [6] coordination only |
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(52.03.01)Topaz Group |
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52.03.01.01 Topaz Al2SiO4(F,OH)2 Pbnm 2/m 2/m 2/m |
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52.03.01.02 Krieselite! (Al,Ga)2(Ge,C)O4(OH)2 P nma 2/m 2/m 2/m |
| Strunz Class: |
09.AF.35 09 - SILICATES (Germanates) |
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09.A - Nesosilicates |
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09.AF -Nesosilicates with additional anions; |
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09.AF.35 Topaz Al2SiO4(F,OH)2 Pbnm 2/m 2/m 2/m |
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09.AF.35 Krieselite! (Al,Ga)2(Ge,C)O4(OH)2 P nma 2/m 2/m 2/m |
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Other Krieselite Information
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| See Also: |
Links to other databases for Krieselite :
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
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Print or Cut-and-Paste your Krieselite Specimen Label here :
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Krieselite
(Al,Ga)2(Ge,C)O4 (OH)2
Dana No: 52.03.01.02 Strunz No: 09.AF.35
Locality:
Notes:
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