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Cristobalite - Wikipedia
https://en.wikipedia.org/wiki/Cristobalite
WebCristobalite (/ k r ɪ ˈ s t oʊ b ə ˌ l aɪ t /) is a mineral polymorph of silica that is formed at very high temperatures. It has the same chemical formula as quartz , SiO 2 , but a distinct crystal structure.
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Cristobalite | Silica, Quartz & Glass | Britannica
https://www.britannica.com/science/cristobalite
WebCristobalite, the stable form of silica (silicon dioxide, SiO2) between its melting point of 1,728° C (3,142° F) and 1,470° C (2,678° F), below which tridymite is the stable form. Cristobalite has two modifications: low-cristobalite, which occurs naturally up to 268° C (514° F) but is not stable;
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Cristobalite: The mineral Cristobalite information and pictures
https://www.minerals.net/mineral/cristobalite.aspx
WebCristobalite is an odd form of silica. It is composed of the same elements as Quartz but has a different crystal structure, making it a separate mineral. Cristobalite is found in volcanic sources almost always associated with the natural glass rock obsidian. It usually forms in vesicles and gas pockets with the obsidian.
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Cristobalite: Mineral information, data and localities. - mindat.org
https://www.mindat.org/show.php?id=1155
WebCristobalite is a silica polymorph that is thermodynamically stable only at temperatures above 1470°C, up to the melting point at 1705°C, at atmospheric ...
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Cristobalite Mineral Data
http://webmineral.com/data/Cristobalite.shtml
WebCristobalite. Comments: White crystals of cristobalite frozen in obsidian glass. Location: Cerro San Cristobal, Pachuca, Hidalgo, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals. Cristobalite Crystallography. Axial Ratios: a:c = 1:1.39167. Cell Dimensions: a = 4.971, c = 6.918, Z = 4; V = 170.95 Den (Calc)= 2.33. Crystal System:
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Cristobalite - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/earth-and-planetary-sciences/cristobalite
WebCristobalite, a dominant mineral in volcanic rocks, is observed as a detrital mineral in soils formed on pyroclastic volcanic materials, but it is rare in other soils (Drees et al., 1989; Cronin et al., 1996; Sommer et al., 2006).
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6.11F: Structure - β-Cristobalite (SiO₂) - Chemistry LibreTexts
https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Map%3A_Inorganic_Chemistry_(Housecroft)/06%3A_Structures_and_Energetics_of_Metallic_and_Ionic_solids/6.11%3A_Ionic_Lattices/6.11F%3A_Structure_-_-Cristobalite_(SiO)
WebOne form that is derived from quartz is beta-cristobalite, which is found in high temperature. Some other forms are beta-quartz, alpha-quartz, beta-tridymite, alpha-tridymite, alpha=cristobalite, and many more. The …
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The nature and formation of cristobalite at the Soufrière Hills …
https://link.springer.com/article/10.1007/s00445-013-0696-3
WebFeb 21, 2013 · Feathery crystallites and micro-crystals of cristobalite and quartz associated with volcanic glass, identified using SEM-Raman, are interpreted to have formed by varying amounts of devitrification. We discuss mechanisms of silica transport and cristobalite formation, and their implications for petrological interpretations and dome stability.
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Cristobalite SiO2 - Handbook of Mineralogy
https://handbookofmineralogy.org/pdfs/cristobalite.pdf
WebCristobalite SiO2. c°2001 Mineral Data Publishing, version 1.2. Crystal Data: Tetragonal, pseudocubic. Point Group: 422: As pseudo-octahedral crystals, to 4 mm, with f110g and f331g, rarely pseudocubic. Commonly dendritic to skeletal; as spherulites to several cm; ̄brous or microcrystalline (\opal"), massive.
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cristobalite - NIST Chemistry WebBook
https://webbook.nist.gov/cgi/cbook.cgi?ID=14464-46-1
Webcristobalite. Formula: O 2 Si. Molecular weight: 60.0843. IUPAC Standard InChI: InChI=1S/H2OSi/c1-2/h2H2. IUPAC Standard InChIKey: HZBAVWLZSLOCFR-UHFFFAOYSA-N. CAS Registry Number: 14464-46-1. Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file. The 3d structure may be …
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