[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community. Articles are solicited from collector and scientific authors. General Banalsite InformationBaNa2Al4Si4O16 |
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 |
BaNa2Al4Si4O16 |
Found in a vein in manganese ore. May form a series with stronalsite. |
Valid Species (Pre-IMA) 1944 |
Benalli mine, Rhiw, Lleyn Peninsula, Caernarvonshire, Wales, UK. Link to MinDat.org Location Data. |
Named from a contraction of the component cation symbols: Ba, Na,Al, and Si. |
Banalsite + Pronunciation |
ICSD 4447 |
|
PDF 38-401 |
| | Banalsite Image
|
|
Banalsite Crystallographya:b:c =0.8529:1:1.6768 |
a = 8.54, b = 10.0127, c = 16.7897, Z = 4; V = 1,435.66 Den(Calc)= 3.05 |
Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Iba2 |
By Intensity(I/Io): 2.07(1), 3.19(1), 3.5(1), |
|
Mouse
|
| Physical Properties of Banalsite{110} Good, {001} Good |
White. |
3.065 |
Translucent to transparent |
6 - Orthoclase |
Vitreous - Pearly |
white |
| Optical Properties of BanalsiteCI 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 Biaxial (+), a=1.5695, b=1.571, g=1.5775, bire=0.0080, 2V(Calc)=52, 2V(Meas)=41. |
| Calculated Properties of BanalsiteBulk Density (Electron Density)=2.90 gm/cc |
note: Specific Gravity of Banalsite =3.05 gm/cc. Fermion Index = 0.04 |
Boson Index = 0.96 PEBanalsite = 88.93 barns/electron |
U=PEBanalsite x rElectron Density= 258.27 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Banalsite is Not Radioactive | Banalsite Classification76.01.06.01 (76)Tectosilicate Al-Si Framework |
|
(76.01)with Al-Si frameworks |
|
(76.01.06)Banalsite group |
|
|
|
|
09.FA.60 09 - SILICATES (Germanates) |
|
09.F - Tektosilicates without Zeolitic H2O |
|
09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1 |
|
|
| Other Banalsite InformationNAME( Dana8) PHYS. PROP.(Dana8, AmMin 91:1953) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
Links to other databases for Banalsite : |
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 - Mineral and Gemstone Kingdom 13 - Mineralienatlas (Deutsch) 14 - QUT Mineral Atlas 15 - Ruff.Info Search for Banalsite using: Visit our Advertisers for Banalsite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Banalsite Mineral Data : Ask about Banalsite here : Print or Cut-and-Paste your Banalsite Specimen Label here :
| |
|
| | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||