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General Ternesite Information |
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 Chemical Formula: |
Ca5(SiO4)2SO4 | ||
| Composition: |
Molecular Weight = 480.62 gm | ||
| Calcium 41.69 % Ca 58.34 % CaO | |||
| Silicon 11.69 % Si 25.00 % SiO2 | |||
| Sulfur 6.67 % S 16.66 % SO3 | |||
| Oxygen 39.95 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca5(SiO4)2(SO4) | ||
| Environment: |
In calcium-rich xenoliths in leucite tephrite lava. | ||
| IMA Status: |
Approved IMA 1997 (Dana # Added) | ||
| Locality: |
The Ettringer Bellerberg, near Mayen, Eifel, Germany. Link to MinDat.org Location Data. | ||
| Name Origin: |
For Mr. B. Ternes of Mayen, Germany, who found the mineral and provided specimens for the study. | ||
| Name Pronunciation: |
Ternesite + Pronunciation  |
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| Synonym: |
ICSD 85123 | ||
| IMA1995-015 | |||
| PDF 49-1807 | |||
Ternesite Image | |||
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Images:
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Ternesite Crystallography |
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| Axial Ratios: |
a:b:c =0.446:1:0.6616 | ||
| Cell Dimensions: |
a = 6.863, b = 15.387, c = 10.181, Z = 4; V = 1,075.12 Den(Calc)= 2.97 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.83(1), 2.853(0.63), 2.565(0.55), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Ternesite |
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| Cleavage: |
None | ||
| Color: |
Colorless, Bright blue. | ||
| Density: |
2.94 - 2.98, Average = 2.96 | ||
| Diaphaneity: |
Transparent | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
| Hardness: |
4.5 - Between Fluorite and Apatite | ||
| Luster: |
Vitreous (Glassy) | ||
Optical Properties of Ternesite |
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| Gladstone-Dale: |
CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.049 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.214,KPDmeas= 0.2148,KC= 0.204 Ncalc = 1.6 - 1.61 |
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| Optical Data: |
Biaxial (-), a=1.63, b=1.637, g=1.64, bire=0.0100 | ||
Calculated Properties of Ternesite |
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| Electron Density: |
Bulk Density (Electron Density)=2.97 gm/cc note: Specific Gravity of Ternesite =2.97 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0067129231 Boson Index = 0.9932870769 |
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| Photoelectric: |
PETernesite = 5.96 barns/electron U=PETernesite x rElectron Density= 17.67 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ternesite is Not Radioactive |
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Ternesite Classification |
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| Dana Class: |
53.02.04.01 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations | ||
| (53.02)with (SO4), (CrO4), (PO4), etc. | |||
| (53.02.04)Dana Group | |||
| Strunz Class: |
09.AH.20 09 - SILICATES (Germanates) | ||
| 09.A - Nesosilicates | |||
| 09.AH -Nesosilicates with CO3, SO4, PO4, etc. | |||
Other Ternesite Information |
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p655,1998) OPTIC PROP.(MinRec) | ||
| See Also: |
Links to other databases for Ternesite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Ternesite using: Visit our Advertisers for Ternesite : A Bijoux Google Search for TernesiteAdam's Minerals Google Search for Ternesite Cape Minerals Google Search for Ternesite Dakota Matrix Minerals Google Search for Ternesite Excalibur Mineral Corp. Google Search for Ternesite Exceptional Minerals Google Search for Ternesite John Betts Fine Minerals Search for Ternesite McDougall Minerals Google Search for Ternesite Mineral News Website Link Rock and Mineral Shows Google Search for Ternesite Weinrich Minerals, Inc. Google Search for Ternesite Ask about Ternesite here : Print or Cut-and-Paste your Ternesite Specimen Label here :
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