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Thenardite Mineral Data + |
General Thenardite Information |
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| Na2SO4 | |||
| Molecular Weight = 142.04 gm | |||
| Sodium 32.37 % Na 43.63 % Na2O | |||
| Sulfur 22.57 % S 56.37 % SO3 | |||
| Oxygen 45.06 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Na2(SO4) | |||
| Non-marine evaporite deposits in arid climates and alteration of alkali-ignous rocks protected from water. | |||
| Valid Species (Pre-IMA) 1826 | |||
| Espartinas salt lake, Aranjuez, Madrid prov., Spain Link to MinDat.org Location Data. | |||
| Named after the French chemist, Louis Jacques Thenard (1777-1826). | |||
| ICSD 28056 | |||
| PDF 37-1465 | |||
Thenardite Image | |||
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Thenardite Crystallography |
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| a:b:c =0.7933:1:0.4759 | |||
| a = 9.75, b = 12.29, c = 5.85, Z = 8; V = 700.99 Den(Calc)= 2.69 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: F ddd | |||
| By Intensity(I/Io): 2.783(1), 4.66(0.73), 3.178(0.51), | |||
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Physical Properties of Thenardite |
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| [010] Perfect | |||
| White, Grayish white, Yellowish white, Reddish white, Brownish white. | |||
| 2.67 - 2.7, Average = 2.68 | |||
| Transparent | |||
| Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende). | |||
| Encrustations - Forms crust-like aggregates on matrix. | |||
| Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | |||
| Tabular - Form dimensions are thin in one direction. | |||
| 2.5 - Finger Nail | |||
| Fluorescent. | |||
| Vitreous - Greasy | |||
| Nonmagnetic | |||
| white | |||
Optical Properties of Thenardite |
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| CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1774,KPDmeas= 0.1778,KC= 0.1827 |
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| Biaxial (+), a=1.471, b=1.477, g=1.484, bire=0.0130, 2V(Calc)=86, 2V(Meas)=83. Dispersion none. | |||
| none. | |||
| none. | |||
| none. | |||
Calculated Properties of Thenardite |
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relectron=2.65 gm/cc |
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| Fermion Index = 0.0019 Boson Index = 0.9981 |
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PEThenardite = 1.88 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Thenardite is Not Radioactive |
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Thenardite Classification |
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| 28.2.3.1 (28)Anhydrous Acid and Sulfates | |||
| (28.2)(A+)2 XO4 | |||
| (28.2.3)Dana Group | |||
| VI/A.07-10 VI - Sulfates,Chromates,Molybdates and Tungstates | |||
| VI/A - Waterfree sulfates [SO4]2- without unfamiliar anions. cations of very big size | |||
| VI/A.07 - Thenardite - Mascagnite series | |||
Other Thenardite Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) | |||
| Links to other databases for Thenardite : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 - Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Athena 6 - EUROmin Project 7 - Ecole des Mines de Paris 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - MinMax(Deutsch) 14 - MinMax(English) 15 - Mineral and Gemstone Kingdom 16 - Mineralienatlas (Deutsch) 17 - QUT Mineral Atlas 18 - Ruff.Info 19 - WWW-MINCRYST 20 - YupRocks Search for Thenardite using: Visit our Advertisers for Thenardite : 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 Thenardite Mineral Data : Ask about Thenardite here : Print or Cut-and-Paste your Thenardite Specimen Label here :
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