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Sanidine Mineral Data + |
General Sanidine Information |
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| (K,Na)(Si,Al)4O8 | |||
| Molecular Weight = 274.30 gm | |||
| Potassium 10.69 % K 12.88 % K2O | |||
| Sodium 2.10 % Na 2.82 % Na2O | |||
| Aluminum 9.84 % Al 18.59 % Al2O3 | |||
| Silicon 30.72 % Si 65.71 % SiO2 | |||
| Oxygen 46.66 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| K0.75Na0.25AlSi3O8 | |||
| Acid volcanic rocks. | |||
| Valid Species (Pre-IMA) 1808 | |||
| Common world wide occurrences. Link to MinDat.org Location Data. | |||
| From the Greek sanis - "little plate" and idos - "to see." | |||
Sanidine Image | |||
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Sanidine Crystallography |
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| a:b:c =0.6588:1:0.5534 | |||
| a = 8.562, b = 12.996, c = 7.193, Z = 4; beta = 116.016° V = 719.28 Den(Calc)= 2.53 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | |||
| By Intensity(I/Io): 3.26(1), 3.22(0.9), 3.27(0.75), | |||
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Physical Properties of Sanidine |
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| [001] Perfect, [010] Good | |||
| Colorless, White, Gray, Yellowish white, Reddish white. | |||
| 2.52 | |||
| Transparent to translucent | |||
| Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | |||
| Blocky - Crystal shape tends to be equant (e.g. feldspars). | |||
| Massive - Granular - Common texture observed in granite and other igneous rock. | |||
| Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | |||
| 6 - Orthoclase | |||
| Non-fluorescent. | |||
| Vitreous - Pearly | |||
| white | |||
Optical Properties of Sanidine |
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| CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2076,KPDmeas= 0.2085,KC= 0.2058 |
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| Biaxial (-), a=1.518-1.525, b=1.523-1.53, g=1.525-1.531, bire=0.0060-0.0070, 2V(Calc)=48-64, 2V(Meas)=60-0. Dispersion r < v distinct. | |||
| colorless. | |||
| colorless. | |||
| colorless. | |||
Calculated Properties of Sanidine |
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relectron=2.51 gm/cc |
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| Fermion Index = 0.01458 Boson Index = 0.98542 |
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PESanidine = 2.57 barns/electron |
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| GRapi = 152.94 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Sanidine |
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Sanidine Classification |
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| 76.1.1.2 (76)Tectosilicate Al-Si Framework | |||
| (76.1)with Al-Si frameworks | |||
| (76.1.1)K (Na,Ba) feldspars | |||
| VIII/J.06-20 VIII - Silicates | |||
| VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders | |||
| VIII/J.06 - Feldspar group, Buddingtonite - Orthoclase - Slawsonite series | |||
Other Sanidine Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | |||
| Links to other databases for Sanidine : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 - Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Athena 6 - CalTech Mineral Spectroscopy 7 - EUROmin Project 8 - Ecole des Mines de Paris 9 - Google Images 10 - Google Scholar 11 - Handbook of Mineralogy (MinSocAm) 12 - Handbook of Mineralogy (UofA) 13 - MinDAT 14 - MinMax(Deutsch) 15 - MinMax(English) 16 - Mineral and Gemstone Kingdom 17 - Mineralienatlas (Deutsch) 18 - Minerals in Thin Sections-Humboldt State 19 - QUT Mineral Atlas 20 - Ruff.Info 21 - Thin Sections - Brock University 22 - UCLA - Petrography Thin-Sections 23 - WWW-MINCRYST Search for Sanidine using: Visit our Advertisers for Sanidine : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Sanidine Mineral Data : Ask about Sanidine here : Print or Cut-and-Paste your Sanidine Specimen Label here :
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