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Lechatelierite Mineral Data
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General Lechatelierite Information
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 Chemical Formula: |
SiO2 |
| Composition: |
Molecular Weight = 60.08 gm |
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Silicon 46.74 % Si 100.00 % SiO2 |
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Oxygen 53.26 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
(SiO2) |
| Environment: |
Naturally occurring fused quartz as inclusions in igneous rock, lightning strikes in sandy soils, and meteor impacts. |
| IMA Status: |
Not Submitted IMA - Published 1915 |
| Locality: |
Meteor Crater, Coconino County, Arizona, USA and other World wide occurrences. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Henry Louis Le Chatelier (1850-1936), French-Italian chemist. |
| Synonym: |
Fulgurites |
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Lechatelierite Image |
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Images:
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Lechatelierite Trinitite
Comments: Fused silica sand (trinitite) generated by the first nuclear (fission) bomb. Although man-made and not a valid mineral, the specimen has historic value.
Location: Trinity Flats, White Sands, New Mexico. It came into existance at 5:29 a.m., July 16, 1945.
Scale: Specimen size 4.1 cm.
© Paul M. Schumacher |
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Lechatelierite Crystallography
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| Crystal System: |
Amorphous- No Crystals |
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Physical Properties of Lechatelierite
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| Cleavage: |
None |
| Color: |
Colorless, White. |
| Density: |
2.5 - 2.65, Average = 2.57 |
| Diaphaneity: |
Translucent |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Habit: |
Porcelainous - Fine-grained, translucent massive material like broken china |
| Hardness: |
6.5 - Pyrite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Lechatelierite
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| Gladstone-Dale: |
CI meas= 0.066 (Fair) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1942,KC= 0.208
Ncalc = 1.52 - 1.55 |
| Optical Data: |
Isotropic, n=1.5. |
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Calculated Properties of Lechatelierite
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| Electron Density: |
Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Lechatelierite =2.58 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PELechatelierite = 1.80 barns/electron
U=PELechatelierite x rElectron Density= 4.62 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lechatelierite is Not Radioactive |
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Lechatelierite Classification
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| Dana Class: |
75.00.00.00 (75)Tektosilicate Minerals |
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(75.00)Without Dana Classification Numbers |
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(75.00.00)Silica Group |
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75.00.00.00 Alflarsenite NaCa2Be3Si4O13(OH)•2H2O P 21 2 |
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75.00.00.00 Florkeite (K3Ca2Na)[Al8Si8O32]•12H2O P1 1 |
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75.00.00.00 Lechatelierite* SiO2 None |
| Strunz Class: |
04.DA.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DA -With small cations |
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04.DA.30 Lechatelierite* SiO2 None |
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Other Lechatelierite Information
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| References: |
NAME( Bull. Soc. Fran, de Min., vol. 38, pp. 182-186 (1915)) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Lechatelierite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
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Print or Cut-and-Paste your Lechatelierite Specimen Label here :
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Lechatelierite
SiO2
Dana No: 75.00.00.00 Strunz No: 04.DA.30
Locality:
Notes:
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