Asbecasite Mineral Data

Asbecasite Mineral Data
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General Asbecasite Information

Help on Chemical Formula: Chemical Formula: Ca3(Ti,Sn)As+++6Si2Be2O20
Help on Composition: Composition: Molecular Weight = 1,057.85 gm
   Calcium    10.23 %  Ca   14.31 % CaO
   Titanium    3.17 %  Ti    5.29 % TiO2
   Beryllium   1.70 %  Be    4.73 % BeO
   Aluminum    0.77 %  Al    1.45 % Al2O3
   Silicon     5.31 %  Si   11.36 % SiO2
   Tin         1.12 %  Sn    1.42 % SnO2
   Arsenic    47.45 %  As   62.65 % As2O3
   Oxygen     30.25 %  O
             ______        ______ 
             100.00 %      101.21 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2.7Ti0.7Sn0.1As6.7Si2Al0.3Be2O20
Help on Environment: Environment: On cleft faces in orthogneiss.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: East flank of Pizzo Cervandone, Alpe Devero, Val d'Aosta, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name origin for Asbecasite is the main elements: As,Be,Ca,Si.
Help on Name Pronunciation: Name Pronunciation: Asbecasite + Pronunciation Say ASBECASITE
Help on Synonym: Synonym: ICSD 74290
  PDF 19-87
 

Asbecasite Image

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Asbecasite

Comments: Brownish yellow asbecasite prismatic crystal.
Location: Cervandone, Val d'Ossola, Lombardy, Italy. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Asbecasite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.83014
Help on Cell Dimensions: Cell Dimensions: a = 8.36, c = 15.3, Z = 2; V = 926.05 Den(Calc)= 3.79
Help on Crystal System: Crystal System: Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: P 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.23(1), 1.153(0.7), 1.57(0.7),
Click Here for Large Asbecasite Structure Window Crystal Structure:

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Sacerdoti M , Parodi G C , Mottana A , Maras A , Ventura G D , Mineralogical Magazine , 57 (1993) p.315-322, Asbecasite: crystal structure refinement and crystal chemistry

 

Physical Properties of Asbecasite

Help on Cleavage: Cleavage: {1010} Good, {1010} Good, {1010} Good
Help on Color: Color: Lemon, Brownish.
Help on Density: Density: 3.7
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Help on Hardness: Hardness: 6.5-7 - Pyrite-Quartz
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Asbecasite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.063 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.223,KPDmeas= 0.2284,KC= 0.2381
Ncalc = 1.88 - 1.9
Help on Optical Data: Optical Data: Uniaxial (-), e=1.83, w=1.86, bire=0.0300.
 

Calculated Properties of Asbecasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Asbecasite =3.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEAsbecasite = 38.17 barns/electron
U=PEAsbecasite x rElectron Density= 132.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Asbecasite is Not Radioactive
 

Asbecasite Classification
Help on Dana Class: Dana Class: 45.01.03.01 (45)Acid and normal Antimonites, Arsenites and Phosphites
  (45.01)with miscellaneous formulae
  (45.01.03)Dana Group
 
45.01.03.01 Asbecasite Ca3(Ti,Sn)As6Si2Be2O20 P 3c 3m
Help on Strunz Class: Strunz Class: 04.JB.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JB -Arsenites, antimonites, bismuthites; with additional anions, without H2O
 
04.JB.30 Asbecasite Ca3(Ti,Sn)As6Si2Be2O20 P 3c 3m
 

Other Asbecasite Information
Help on References: References: NAME( AntBidBlaNic4) 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 Asbecasite :
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

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Asbecasite

Ca3(Ti,Sn)As+++6Si2Be2O20
Dana No: 45.01.03.01 Strunz No: 04.JB.30
Locality:

 

Notes: