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General Tychite Information |
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 Chemical Formula: |
Na6Mg2(CO3)4(SO4) | ||
| Composition: |
Molecular Weight = 522.65 gm | ||
| Sodium 26.39 % Na 35.58 % Na2O | |||
| Magnesium 9.30 % Mg 15.42 % MgO | |||
| Carbon 9.19 % C 33.68 % CO2 | |||
| Sulfur 6.14 % S 15.32 % SO3 | |||
| Oxygen 48.98 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Na6Mg2(CO3)4(SO4) | ||
| Environment: |
Continental evaporite deposits. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1905 | ||
| Locality: |
Borax Lake, San Bernardino Co., California. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named from the Greek for "luck or chance" because out of 5,000 northupite crystals, the last 10 were tychite. | ||
| Name Pronunciation: |
Tychite  |
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| Synonym: |
ICSD 27792 | ||
| PDF 22-479 | |||
Tychite Image | |||
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Images:
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Tychite Crystallography |
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| Cell Dimensions: |
a = 13.898, Z = 8; V = 2,684.46 Den(Calc)= 2.59 | ||
| Crystal System: |
Isometric - DiploidalH-M Symbol (2/m 3) Space Group: F d3 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.674(1), 4.187(0.76), 2.459(0.4), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Tychite |
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| Cleavage: |
None | ||
| Color: |
Colorless, White. | ||
| Density: |
2.5 | ||
| Diaphaneity: |
Transparent | ||
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. | ||
| Habit: |
Crystalline - Coarse - Occurs as well-formed coarse sized crystals. | ||
| Hardness: |
3.5 - Copper Penny | ||
| Luminescence: |
Fluorescent, Long UV=cream-white. | ||
| Luster: |
Vitreous (Glassy) | ||
| Magnetism: |
Nonmagnetic | ||
| Streak: |
white | ||
Optical Properties of Tychite |
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| Gladstone-Dale: |
CI meas= -0.038 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1969,KPDmeas= 0.204,KC= 0.1966 Ncalc = 1.49 - 1.51 |
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| Optical Data: |
Isotropic, n=1.51. | ||
Calculated Properties of Tychite |
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| Electron Density: |
Bulk Density (Electron Density)=2.56 gm/cc note: Specific Gravity of Tychite =2.59 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.01 Boson Index = 0.99 |
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| Photoelectric: |
PETychite = 1.11 barns/electron U=PETychite x rElectron Density= 2.83 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tychite is Not Radioactive |
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Tychite Classification |
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| Dana Class: |
17.01.01.01 (17)Compound Carbonates | ||
| (17.01)with miscellaneous formulae | |||
| (17.01.01)Tychite Group | |||
| Strunz Class: |
05.BF.05 05 - CARBONATES (NITRATES) | ||
| 05.B - Carbonates with additional anions, without H2O | |||
| 05.BF -With (Cl), SO4, PO4, TeO3 | |||
Other Tychite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Tychite : 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 15 - WWW-MINCRYST Search for Tychite using: Visit our Advertisers for Tychite : A Bijoux Google Search for TychiteAdam's Minerals Google Search for Tychite Cape Minerals Google Search for Tychite Dakota Matrix Minerals Google Search for Tychite Excalibur Mineral Corp. Google Search for Tychite Exceptional Minerals Google Search for Tychite John Betts Fine Minerals Search for Tychite McDougall Minerals Google Search for Tychite Mineral News Website Link Rock and Mineral Shows Google Search for Tychite Weinrich Minerals, Inc. Google Search for Tychite Ask about Tychite here : Print or Cut-and-Paste your Tychite Specimen Label here :
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