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Trembathite Mineral Data |
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Trembathite Mineral Data |
General Trembathite Information |
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 Chemical Formula: |
(Mg,Fe++)3B7O13Cl | ||
| Composition: |
Molecular Weight = 415.69 gm | ||
| Magnesium 13.16 % Mg 21.82 % MgO | |||
| Iron 10.08 % Fe 12.96 % FeO | |||
| Boron 18.20 % B 58.62 % B2O3 | |||
| Chlorine 8.53 % Cl 8.53 % Cl | |||
| - % Cl -1.92 % -O=Cl2 | |||
| Oxygen 50.04 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mg2.25Fe2+0.75B7O13Cl | ||
| Environment: |
Component of marine evaporite borate deposits. | ||
| IMA Status: |
Approved IMA 1992 | ||
| Locality: |
Salt Springs evaporite deposit, Canada. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Lowell T. Trembath (1936-1994), Canadian mineralogist, Professor of Mineralogy, University of New Brunswick, Fredericton, Canada. | ||
| Name Pronunciation: |
Trembathite + Pronunciation  |
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| Synonym: |
ICSD 76897 | ||
| IMA1991-018 | |||
| PDF 47-1829 | |||
Trembathite Image | |||
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Images:
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Trembathite Crystallography |
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| Axial Ratios: |
a:c = 1:2.44809 | ||
| Cell Dimensions: |
a = 8.574, c = 20.99, Z = 6; V = 1,336.32 Den(Calc)= 3.10 | ||
| Crystal System: |
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.028(1), 2.05(0.73), 2.711(0.66), | ||
Physical Properties of Trembathite |
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| Cleavage: |
None | ||
| Color: |
Colorless, Light blue. | ||
| Density: |
2.84 - 3.34, Average = 3.09 | ||
| Diaphaneity: |
Transparent | ||
| Hardness: |
6-8 | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Trembathite |
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| Gladstone-Dale: |
CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2181,KPDmeas= 0.2188,KC= 0.221 Ncalc = 1.63 - 1.74 |
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| Optical Data: |
Uniaxial (-), e=1.668, w=1.684, bire=0.0160. | ||
Calculated Properties of Trembathite |
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| Electron Density: |
Bulk Density (Electron Density)=3.01 gm/cc note: Specific Gravity of Trembathite =3.09 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.05 Boson Index = 0.95 |
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| Photoelectric: |
PETrembathite = 4.05 barns/electron U=PETrembathite x rElectron Density= 12.20 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Trembathite is Not Radioactive |
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Trembathite Classification |
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| Dana Class: |
25.06.02.02 (25)Anhydrous Borates Containing Hydroxyl or Halogen | ||
| (25.06)Dana Type | |||
| (25.06.02)Boracite Group (Trigonal: R3c) | |||
| Strunz Class: |
06.GA.10 06 - BORATES | ||
| 06.G - Heptaborates and other Megaborates | |||
| 06.GA -Tekto-heptaborates | |||
Other Trembathite Information |
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| References: |
NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.78,p233,1993) OPTIC PROP.(Am.Min.,Vol.78,p233,1993) | ||
| See Also: |
Links to other databases for Trembathite : 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 Trembathite using: Visit our Advertisers for Trembathite : Ask about Trembathite here : Print or Cut-and-Paste your Trembathite Specimen Label here :
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