Krauskopfite Mineral Data

General Krauskopfite Information

Chemical Formula: BaSi2O4(OH)2•2(H2O) Composition: Molecular Weight = 327.54 gm    Barium    41.93 %  Ba   46.81 % BaO    Silicon   17.15 %  Si   36.69 % SiO₂    Hydrogen   1.85 %  H    16.50 % H₂O    Oxygen    39.08 %  O             ______        ______              100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: BaSi₂O₄(OH)₂•2(H₂O) Environment: In veins cutting sanbornite-quartz-bearing gneissic metamorphic rocks. IMA Status: Approved IMA 1965 Locality: Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co., California. Link to MinDat.org Location Data. Name Origin: Named for Konrad Bates Krauskopf (1910- ), Professor of Geochemistry, Stanford University, Palo Alto, California, USA. Name Pronunciation: Krauskopfite + Pronunciation Synonym: ICSD 26971   PDF 18-192  

Krauskopfite Image

Images:

Krauskopfite Crystallography

Axial Ratios: a:b:c =0.7964:1:0.7378 Cell Dimensions: a = 8.46, b = 10.622, c = 7.837, Z = 4; beta = 94.53° V = 702.05 Den(Calc)= 3.10 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a X Ray Diffraction: By Intensity(I/I_o): 3.84(1), 5.34(0.45), 6.36(0.45), 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

Coda A , dal Negro A , Rossi G , Atti della Accademia Nazionale dei Lincei , 42 (1967) p.859-873, The crystal structure of krauskopfite, Locality: Rush Creek locality, Fresno County, California

 

Physical Properties of Krauskopfite

Cleavage: {010} Perfect, {001} Perfect Color: Colorless, White. Density: 3.14 Diaphaneity: Transparent Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). Hardness: 4 - Fluorite Luster: Vitreous - Pearly Streak: white  

Optical Properties of Krauskopfite

Gladstone-Dale: CI meas= 0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1892,KPDmeas= 0.1868,KC= 0.1923
Ncalc = 1.6 Optical Data: Biaxial (-), a=1.574, b=1.587, g=1.599, bire=0.0250, 2V(Calc)=86, 2V(Meas)=88.  

Calculated Properties of Krauskopfite

Electron Density: Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Krauskopfite =3.10 gm/cc.
Fermion Index: Fermion Index = 0.08
Boson Index = 0.92 Photoelectric: PE_Krauskopfite = 179.48 barns/electron
U=PE_Krauskopfite x rElectron Density= 523.18 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Krauskopfite is Not Radioactive  

Krauskopfite Classification

Dana Class: 74.03.04.02 (74)Phyllosilicate Modulated Layers   (74.03)with joined strips   (74.03.04)Ba phyllosilicates  

74.03.04.01 Sanbornite BaSi2O5 Pmnb 2/m 2/m 2/m

 

74.03.04.02 Krauskopfite BaSi2O4(OH)2•2(H2O) P 2₁/a 2/m

Strunz Class: 09.DH.30 09 - SILICATES (Germanates)   09.D - Inosilicates* Structural terminology according to Liebau (1985)   09.DH -Inosilicates with 4-periodic single chains, Si4O12  

09.DH.30 Krauskopfite BaSi2O4(OH)2•2(H2O) P 2₁/a 2/m

 

Other Krauskopfite Information

References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Krauskopfite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Krauskopfite :

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

Ask about Krauskopfite 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 Krauskopfite Specimen Label here :