Krieselite Mineral Data

General Krieselite Information

Chemical Formula:

(Al,Ga)2(Ge,C)O4 (OH)2

Composition:

Molecular Weight = 230.81 gm

Aluminum 17.54 % Al 33.13 % Al₂O₃

Gallium 15.10 % Ga 20.30 % Ga₂O₃

Germanium 23.59 % Ge 33.99 % GeO₂

Hydrogen 0.87 % H 7.81 % H₂O

Carbon 1.30 % C 4.77 % CO₂

Oxygen 41.59 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al_1.5Ga_0.5Ge_0.75C_0.25O₄(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

Search for Krieselite 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.

Krieselite Crystallography

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

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

By Intensity(I/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wunder B , Marler B , European Journal of Mineralogy , 9 (1997) p.1147-1158, Ge-analogues of aluminium silicates: High-pressure synthesis, and properties of orthorhombic Al2GeO4(OH)2, Note: Space group setting altered to match standard

Physical Properties of Krieselite

Color:

Beige, White.

Diaphaneity:

Translucent

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Krieselite

Optical Data:

Biaxial (?)

NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.1965) where Ncalc=Dcalc*KC+1

Calculated Properties of Krieselite

Electron Density:

Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Krieselite =4.10 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Krieselite= 23.08 barns/electron
U=PE_Krieselite x rElectron Density= 90.61 barns/cc.

Radioactivity:

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

Krieselite Classification

Dana Class:

52.03.01.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.03)with cations in [6] coordination only

(52.03.01)Topaz Group

52.03.01.01 Topaz Al2SiO4(F,OH)2 Pbnm 2/m 2/m 2/m

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)

09.A - Nesosilicates

09.AF -Nesosilicates with additional anions;

09.AF.35 Topaz Al2SiO4(F,OH)2 Pbnm 2/m 2/m 2/m

09.AF.35 Krieselite! (Al,Ga)2(Ge,C)O4(OH)2 P nma 2/m 2/m 2/m

Other Krieselite Information

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

Search for Krieselite using:

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

Visit our Advertisers for Krieselite :

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

Ask about Krieselite 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 Krieselite Specimen Label here :

Krieselite

(Al,Ga)2(Ge,C)O4 (OH)2
Dana No: 52.03.01.02 Strunz No: 09.AF.35
Locality:

Notes: