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General Tetrataenite Information |
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 Chemical Formula: |
FeNi | ||
| Composition: |
Molecular Weight = 57.27 gm | ||
| Iron 48.76 % Fe | |||
| Nickel 51.24 % Ni | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Fe0+0.5Ni0.5 | ||
| Environment: |
Exsolution rims and grains in meteorites and exsolved with antitaenite. | ||
| IMA Status: |
Approved IMA 1979 | ||
| Locality: |
Mesosiderite meteorites and slowly-cooled chondrites below 350 deg. C. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for taenite and the tetragonal crystal form of this polymorph. | ||
| Name Pronunciation: |
Tetrataenite + Pronunciation  |
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| Synonym: |
ICSD 77284 | ||
Tetrataenite Image | |||
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Images:
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Tetrataenite Crystallography |
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| Axial Ratios: |
a:c = 1:1.41413 | ||
| Cell Dimensions: |
a = 2.533, c = 3.582, Z = 2; V = 22.98 Den(Calc)= 8.28 | ||
| Crystal System: |
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.34(1), 2.526(0.8), 2.879(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Tetrataenite |
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| Cleavage: |
None | ||
| Color: |
Gray white, Silver white. | ||
| Density: |
8.275 | ||
| Diaphaneity: |
Opaque | ||
| Fracture: |
Malleable - Deforms rather than breaking apart with a hammer. | ||
| Habit: |
Exsolution Inclusions - Formed by the exsolution of a separate mineral from the parent mineral caused by a temperature drop. | ||
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. | ||
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. | ||
| Hardness: |
3.5 - Copper Penny | ||
| Luster: |
Metallic | ||
| Magnetism: |
Magnetic | ||
| Streak: |
gray | ||
Optical Properties of Tetrataenite |
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| RL Anisotrophism: |
Distinct on well-polished surfaces, bluish green to brownish orange. | ||
| RL Color: |
Creamy white. | ||
Calculated Properties of Tetrataenite |
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| Electron Density: |
Bulk Density (Electron Density)=7.81 gm/cc note: Specific Gravity of Tetrataenite =8.28 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.01 Boson Index = 0.99 |
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| Photoelectric: |
PETetrataenite = 35.95 barns/electron U=PETetrataenite x rElectron Density= 280.71 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tetrataenite is Not Radioactive |
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Tetrataenite Classification |
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| Dana Class: |
01.01.11.03 (01)Native Elements | ||
| (01.01)with metallic elements other than the platinum group | |||
| (01.01.11)Iron-Nickel group | |||
| Strunz Class: |
01.AE.10 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides) | ||
| 01.A - Metals and Intermetallic Alloys | |||
| 01.AE -Iron-chromium family | |||
Other Tetrataenite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) | ||
| See Also: |
Links to other databases for Tetrataenite : 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 - Meteorite Minerals 11 - MinDAT 12 - Mineralienatlas (Deutsch) 13 - Online Mineral Museum 14 - QUT Mineral Atlas 15 - Ruff.Info Search for Tetrataenite using: Visit our Advertisers for Tetrataenite : A Bijoux Google Search for TetrataeniteAdam's Minerals Google Search for Tetrataenite Cape Minerals Google Search for Tetrataenite Dakota Matrix Minerals Google Search for Tetrataenite Excalibur Mineral Corp. Google Search for Tetrataenite Exceptional Minerals Google Search for Tetrataenite John Betts Fine Minerals Search for Tetrataenite McDougall Minerals Google Search for Tetrataenite Mineral News Website Link Rock and Mineral Shows Google Search for Tetrataenite Weinrich Minerals, Inc. Google Search for Tetrataenite Ask about Tetrataenite here : Print or Cut-and-Paste your Tetrataenite Specimen Label here :
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