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  • 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 crystals . . .
    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
  • 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
  • The Mineral tridymite - The Mineral and Gemstone Kingdom
    Detailed properties, locality information guide about the mineral tridymite (quartz polymorph)
  • 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
  • 40 Facts About Tridymite
    Tridymite is a fascinating mineral that belongs to the silica group It is one of the polymorphs of silicon dioxide (SiO₂), meaning it shares the same chemical composition as quartz but has a different crystal structure Let's dive into some intriguing facts about this unique mineral
  • 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 SiO2 - Handbook of Mineralogy
    tridymite is formed between 870± C and 1470±C; a number of stacking polytypes are known, especially non-terrestrial Occurrence: Deposited from hot gases in vesicles and lithophysae; as phenocrysts in felsic volcanic rocks, and less commonly, in basalts; in contact metamorphosed sandstone
  • EMSL | Silica Testing
    There are quartz, cristobalite, tridymite, and other rare forms of crystalline silica Quartz is so common that the term quartz is often used to refer to crystalline silica And sand is often used to refer to quartz





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