
Tridymite - Wikipedia
Tridymite is a high-temperature polymorph of silica and usually occurs as minute tabular white or colorless pseudo-hexagonal crystals, or scales, in cavities in felsic volcanic rocks. Its chemical formula is Si O 2. Tridymite was first described in 1868 and the type location is in Hidalgo, Mexico.
Tridymite: Mineral information, data and localities. - mindat.org
From the Greek "Tridymos", triplet, alluding to its common twinning as trillings. Tridymite is a low pressure, mostly high-temperature-stable polymorph of silica that can also form or persist metastably at low temperatures.
Tridymite | Silica polymorph, High-temperature form, Hexagonal …
Tridymite forms thin hexagonal plates that are generally twinned, often in groups of three; its name alludes to this habit. It commonly occurs in igneous rocks, more abundantly than cristobalite, as in the trachytes of Rhineland-Palatinate, Germany; northern Italy; and in the Massif Central, France.
The Mineral tridymite - The Mineral and Gemstone Kingdom
Detailed properties, locality information guide about the mineral tridymite (quartz polymorph).
Tridymite Mineral Data
Comments: Clear, pseudohexagonal crystals of tridymite on matrix. Location: Bellerberg quarry, Laacher See, Rhineland-Palatinate, Germany. Scale: Not Given. Colorless, White, Yellowish white, Gray. Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. Platy - Sheet forms (e.g. micas).
Tridymite - PubChem
Information on 6 consumer products that contain Silica, crystalline - tridymite in the following categories is provided: • Auto Products • Home Maintenance • Pet Care
Tridymite - an overview | ScienceDirect Topics
Tridymite and cristobalite are high-temperature, low-pressure polymorphs of silica, forming stably above 870°C (tridymite) and 1470°C (cristobalite). You might find these chapters and articles relevant to this topic.
β-Tridymite: Mineral information, data and localities. - mindat.org
Beta-Tridymite (β-tridymite or high-tridymite) is a low pressure, high-temperature-stable polymorph of silica that occurs most notably as vapour-deposited, platey crystals in vesicles in some volcanic rocks, also rarely as phenocrysts in some felsic volcanics, or as a contact metamorphic material in some hornfels.
TRIDYMITE Definition & Meaning - Merriam-Webster
The meaning of TRIDYMITE is a mineral SiO2 that is a silica, differs from quartz in its usually minute thin tabular orthorhombic forms of crystallization, and is found in cavities in trachyte and similar rocks (hardness 7, specific gravity 2.28—2.33).
TRIDYMITE (Silicon Dioxide) - Amethyst Galleries
Tridymite is a polymorph of quartz, meaning that it is composed of the same chemistry, SiO 2, but has a different structure. Both quartz and tridymite are polymorphs with all the members of the Quartz Group which also include coesite, cristobalite and stishovite.
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