- Source: Lechatelierite
- Lechatelierite
- Mineraloid
- Fulgurite
- Quartz
- Tektite
- Libyan desert glass
- Shatter cone
- Shocked quartz
- Pantasma
- List of impact structures on Earth
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Lechatelierite is silica glass, amorphous SiO2, non-crystalline mineraloid. It is named for Henry Louis Le Chatelier.
Structure
Lechatelierite is a mineraloid as it does not have a crystal structure. Although not a true mineral, it is often classified in the quartz mineral group.
Formation
One common way in which lechatelierite forms naturally is by very-high-temperature melting of quartz sand during a lightning strike. The result is an irregular, branching, often foamy hollow tube of silica glass called a fulgurite. Not all fulgurites are lechatelierite; the original sand must be nearly pure silica.
Lechatelierite also forms as the result of high pressure shock metamorphism during meteorite impact cratering and is a common component of a type of glassy ejecta called tektites. Most tektites are blobs of impure glassy material, but tektites from the Sahara Desert in Libya and Egypt, known as Libyan desert glass, are composed of almost pure silica that is almost pure lechatelierite. High pressure experiments have shown that shock pressures of 85 GPa are needed to produce lechatelierite in quartz grains embedded in granite.
Lechatelierite was formed during the impact of a meteorite into a layer of Coconino Sandstone at Meteor Crater in Arizona. During the rapid pressure reduction following the impact, steam expanded the newly formed lechatelierite. The shattered and expanded glass has a density less than that of water.
Lechatelierite may also form artificially, a unique example being the trinitite produced by melting of quartz sand at the first nuclear bomb explosion at Trinity Flats, White Sands, New Mexico.
References
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Lechatelierite - Wikipedia
Lechatelierite is silica glass, amorphous SiO 2, non-crystalline mineraloid. It is named for Henry Louis Le Chatelier. Lechatelierite is a mineraloid as it does not have a crystal structure. …
Lechatelierite: Mineral information, data and localities. - mindat.org
It can form when lightning strikes sand or other very silica-rich sediments and rocks, creating structures called fulgurites, hollow tubes that are often irregular and branched. It also forms by …
Lechatelierite | Volcanic Glass, Silica, Quartz | Britannica
Lechatelierite, a natural silica glass (silicon dioxide, SiO2) that has the same chemical composition as coesite, cristobalite, stishovite, quartz, and tridymite but has a different crystal …
Moldavites: Natural Or Fake? | Gems & Gemology - GIA
Besides their flow texture and abundant bubbles (almost always much more abundant than in an artificial glass), moldavites contain “wires” of lechatelierite, a high-temperature form of SiO 2. …
LECHATELIERITE (Fused Silica Glass) - Amethyst Galleries
This lechatelierite specimen is a fulgarite, the result of a lighting strike in desert sands. It is an extremely light and very thin shell, with many tiny holes. The color varies from light brown to …
Lechatelierite
Melted quartz lechatelierite often called fulgurite from melted sand of a lightning strike, close up of one end. Rolf Luetcke specimen and photo.
Lechatelierite Definition & Meaning - Merriam-Webster
The meaning of LECHATELIERITE is a mineral SiO2 consisting of a vitreous or glassy silica formed naturally by the melting of quartz sand as a result of lightning or occasionally the heat …
Desert Glass / Lechatelierite / Libyanite Info - realgems.org
Lechatelierite (also called Libyan Desert Glass, Libyanite or simply LDG) is an amorphous silica glass. It is no true mineral because it has no crystal structure although its formula (SiO2) is the …
Lechatelierite Mineral Data
Named for Henry Louis Le Chatelier (1850-1936), French-Italian chemist. Comments: Fused silica sand (trinitite) generated by the first nuclear (fission) bomb. Although man-made and not a …
Define "Lechatelierite" : SkyFall Meteorites Glossary
An amorphous silica glass formed naturally by the heat of impact/detonation of a large meteorite on/over quartz sand. Lechatelierite is found as an inclusion in Libyan Desert Glass. Most …