Krauskopfite Mineral Data

Krauskopfite Mineral Data
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General Krauskopfite Information

Help on Chemical Formula: Chemical Formula: BaSi2O4(OH)2•2(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: BaSi2O4(OH)2•2(H2O)
Help on Environment: Environment: In veins cutting sanbornite-quartz-bearing gneissic metamorphic rocks.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Konrad Bates Krauskopf (1910- ), Professor of Geochemistry, Stanford University, Palo Alto, California, USA.
Help on Name Pronunciation: Name Pronunciation: Krauskopfite + Pronunciation Say KRAUSKOPFITE
Help on Synonym: Synonym: ICSD 26971
  PDF 18-192
 

Krauskopfite Image

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Krauskopfite

Comments: White pearly crystalline krauskopfite on quartz.
Location: Rush Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

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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

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

Optical Properties of Krauskopfite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

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

Krauskopfite Classification
Help on Dana Class: 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
Help on Strunz Class: 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
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Krauskopfite

BaSi2O4(OH)2•2(H2O)
Dana No: 74.03.04.02 Strunz No: 09.DH.30
Locality:

 

Notes: