Banalsite Mineral Data + Say BANALSITE

General Banalsite Information

Help on Chemical  Formula: Chemical Formula: BaNa2Al4Si4O16
Help on Composition: Composition: Molecular Weight = 659.57 gm
   Barium    20.82 %  Ba   23.25 % BaO
   Sodium     6.97 %  Na    9.40 % Na2O
   Aluminum  16.36 %  Al   30.92 % Al2O3
   Silicon   17.03 %  Si   36.44 % SiO2
   Oxygen    38.81 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaNa2Al4Si4O16
Help on Environment: Environment: Found in a vein in manganese ore. May form a series with stronalsite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1944
Help on Locality: Locality: Benalli mine, Rhiw, Lleyn Peninsula, Caernarvonshire, Wales, UK. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from a contraction of the component cation symbols: Ba, Na,Al, and Si.
Help on Synonym: Synonym: ICSD 4447
  PDF 38-401
 

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Banalsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8525:1:1.678
Help on Cell Dimensions: Cell Dimensions: a = 8.5, b = 9.97, c = 16.73, Z = 4; V = 1,417.78 Den(Calc)= 3.09
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: I bam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.07(1), 3.19(1), 3.5(1),
Click Here for Large Banalsite Structure Window Crystal Structure:

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Liferovich R P , Locock A J , Mitchell R H , Shpachenko A K , The Canadian Mineralogist , 44 (2006) p.533-546, The crystal structure of stronalsite and a, redetermination of the structure of banalsite, Locality: Benallt mine, Wales

View Additional jPOWD Structure files for Banalsite
[1] [2]
 

Physical Properties of Banalsite

Help on Cleavage: Cleavage: [110] Good, [001] Good
Help on Color: Color: White.
Help on Density: Density: 3.065
Help on Diaphaniety: Diaphaniety: Translucent to transparent
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Banalsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1853,KPDmeas= 0.1868,KC= 0.1874
Help on Optical Data: Optical Data: Biaxial (+), a=1.5695, b=1.571, g=1.5775, bire=0.0080, 2V(Calc)=52, 2V(Meas)=41.
 

Calculated Properties of Banalsite

Help on Electron Density: Electron Density:

relectron=2.92 gm/cc
note: rBanalsite =3.07 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.04524
Boson Index = 0.95476
Help on Photoelectric: Photoelectric:

PEBanalsite = 88.93 barns/electron
U=PEBanalsite x relectron= 259.54 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Banalsite is Not Radioactive

 

Banalsite Classification

Help on  Dana Class: Dana Class: 76.1.6.1 (76)Tectosilicate Al-Si Framework
  (76.1)with Al-Si frameworks
  (76.1.6)Banalsite group
 
76.1.6.1 Banalsite BaNa2Al4Si4O16 I bam 2/m 2/m 2/m
 
76.1.6.2 Stronalsite SrNa2Al4Si4O16 I bam,Iba2 Ortho
 
76.1.6.3 Lisetite Na2CaAl4Si4O16 Pbc2 mm2
 
76.1.6.4 Svyatoslavite CaAl2Si2O8 P 21 2
Help on  Strunz Class: Strunz Class: VIII/J.07-100 VIII - Silicates
  VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders
  VIII/J.07 - Feldspar group, Anorthoclase - Anorthite - Banalcite series
 
VIII/J.07-10 Anorthoclase (Na,K)AlSi3O8 C1 1
 
VIII/J.07-20 Albite NaAlSi3O8 C1 1
 
VIII/J.07-30 Oligoclase (Na,Ca)(Si,Al)4O8 C1 1
 
VIII/J.07-40 Andesine* (Na,Ca)(Si,Al)4O8 C1 1
 
VIII/J.07-50 Labradorite* (Ca,Na)(Si,Al)4O8 C1 1
 
VIII/J.07-60 Bytownite* (Ca,Na)(Si,Al)4O8 C1 1
 
VIII/J.07-70 Anorthite CaAl2Si2O8 P1,I1 1
 
VIII/J.07-75 Dmisteinbergite CaAl2Si2O8 P 6/mmm 6/m 2/m 2/m
 
VIII/J.07-80 Svyatoslavite CaAl2Si2O8 P 21 2
 
VIII/J.07-90 Stronalsite SrNa2Al4Si4O16 I bam,Iba2 Ortho
 
VIII/J.07-100 Banalsite BaNa2Al4Si4O16 I bam 2/m 2/m 2/m
 
VIII/J.07-110 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m
 

Other Banalsite Information

Help on References: References: NAME( Dana8) 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 Banalsite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 - Mineral and Gemstone Kingdom 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris

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Banalsite

BaNa2Al4Si4O16
Dana No: 76.1.6.1 Strunz No: VIII/J.07-100
Locality:

 

Notes:

 

 
   
 
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