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Vale da Vilariça, Torre de Moncorvo, Bragança District, Portugal
© Martins da Pedra
A natural fused, X-ray amorphous silica.
Originates when lightning strikes sand or other very SiO2-rich sediments and rocks.
Lechatelierites/fulgurites form hollow tubes that are often irregular and branched.
Also forms on impact of meteorites as a result of sand melting.
The major component of the impact glass called Libyan Desert Glass.
Classification of Lechatelierite
|Strunz 8th edition ID:||4/D.01-10|
|Nickel-Strunz 10th (pending) edition ID:||4.DA.30|
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
A : With small cations: Silica family
|Hey's CIM Ref.:||7.8.6|
7 : Oxides and Hydroxides
8 : Oxides of Si
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Physical Properties of Lechatelierite
Chemical Properties of Lechatelierite
|Essential elements:||O, Si|
|All elements listed in formula:||O, Si|
Relationship of Lechatelierite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Lechatelierite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Lechatelierite
Rogers, A.F. (1930), A unique occurrence of lechatelierite or silica glass, American Journal of Science: 19: 195-202.
Frondel, Clifford (1962), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume III: 325.
Internet Links for Lechatelierite
Localities for Lechatelierite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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