General Banalsite Information Chemical Formula: |
BaNa2Al4Si4O16 |
Composition: |
Molecular Weight = 659.57 gm |
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Barium 20.82 % Ba 23.25 % BaO |
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Sodium 6.97 % Na 9.40 % Na2O |
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Aluminum 16.36 % Al 30.92 % Al2O3 |
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Silicon 17.03 % Si 36.44 % SiO2 |
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Oxygen 38.81 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
BaNa2Al4Si4O16 |
Environment: |
Found in a vein in manganese ore. May form a series with stronalsite. |
IMA Status: |
Valid Species (Pre-IMA) 1944 |
Locality: |
Benalli mine, Rhiw, Lleyn Peninsula, Caernarvonshire, Wales, UK. Link to MinDat.org Location Data. |
Name Origin: |
Named from a contraction of the component cation symbols: Ba, Na,Al, and Si. |
Name Pronunciation: |
Banalsite + Pronunciation |
Synonym: |
ICSD 4447 |
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PDF 38-401 |
| | Banalsite Image
Images:
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Banalsite Crystallography Axial Ratios: |
a:b:c =0.8529:1:1.6768 |
Cell Dimensions: |
a = 8.54, b = 10.0127, c = 16.7897, Z = 4; V = 1,435.66 Den(Calc)= 3.05 |
Crystal System: |
Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Iba2 |
X Ray Diffraction: |
By Intensity(I/Io): 2.07(1), 3.19(1), 3.5(1), |
Crystal Structure:
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Mouse
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| Physical Properties of Banalsite Cleavage: |
{110} Good, {001} Good |
Color: |
White. |
Density: |
3.065 |
Diaphaneity: |
Translucent to transparent |
Hardness: |
6 - Orthoclase |
Luster: |
Vitreous - Pearly |
Streak: |
white |
| Optical Properties of Banalsite Gladstone-Dale: |
CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1878,KPDmeas= 0.1868,KC= 0.1874 Ncalc = 1.57 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 Electron Density: |
Bulk Density (Electron Density)=2.90 gm/cc |
note: Specific Gravity of Banalsite =3.05 gm/cc. Fermion Index: |
Fermion Index = 0.04 |
Boson Index = 0.96 Photoelectric: |
PEBanalsite = 88.93 barns/electron |
U=PEBanalsite x rElectron Density= 258.27 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Banalsite is Not Radioactive | Banalsite Classification Dana Class: |
76.01.06.01 (76)Tectosilicate Al-Si Framework |
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(76.01)with Al-Si frameworks |
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(76.01.06)Banalsite group |
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Strunz Class: |
09.FA.60 09 - SILICATES (Germanates) |
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09.F - Tektosilicates without Zeolitic H2O |
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09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1 |
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| Other Banalsite Information References: |
NAME( Dana8) PHYS. PROP.(Dana8, AmMin 91:1953) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Banalsite : |
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 Search for Banalsite using: Visit our Advertisers for Banalsite : A Bijoux Google Search for BanalsiteAdam's Minerals Google Search for Banalsite Cape Minerals Google Search for Banalsite Dakota Matrix Minerals Google Search for Banalsite Excalibur Mineral Corp. Google Search for Banalsite Exceptional Minerals Google Search for Banalsite John Betts Fine Minerals Search for Banalsite McDougall Minerals Google Search for Banalsite Mineral News Website Link Rock and Mineral Shows Google Search for Banalsite Weinrich Minerals, Inc. Google Search for Banalsite Ask about Banalsite here : Print or Cut-and-Paste your Banalsite Specimen Label here :
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