Cristobalite (/krɪˈstoʊbəˌlaɪt/) is a mineral polymorph of silica that is formed at very high temperatures. It has the same chemical formula as quartz...

found naturally occurring as quartz, tridymite (high-temperature form), cristobalite (high-temperature form), stishovite (high-pressure form), and coesite...

polymorphs of cristobalite and / or tridymite. These polymorphs also experience temperature-induced inversions. The inversion of cristobalite at 220 °C can...

appear to be closer to that of cristobalite and tridymite than to quartz. The structures of tridymite and cristobalite are closely related and can be...

small, white, radially clustered crystals (spherulites) of the mineral cristobalite in the black glass produce a blotchy or snowflake pattern (snowflake...

high-temperature form of cristobalite, which have a similar structure, with one kind of atom (such as silicon in cristobalite) at the positions of carbon...

pigeonite. The groundmass contains interstitial quartz or tridymite or cristobalite. Olivine tholeiitic basalt has augite and orthopyroxene or pigeonite...

sudden temperature changes that may damage the crystals. Tridymite and cristobalite are high-temperature polymorphs of SiO2 that occur in high-silica volcanic...

the temperature of formation. The main three polymorphs are quartz, cristobalite, and tridymite. Quartz is the second most common mineral in the world...

include: 3D-Silicates, quartz family Quartz – SiO2 Tridymite – SiO2 Cristobalite – SiO2 Coesite – SiO2 Stishovite – SiO2 Moganite – SiO2 Chalcedony –...

Methyl-CCNU] Silica dust, crystalline, in the form of quartz or cristobalite Tamoxifen 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) Thiotepa (1,1'...

nucleates and transforms to platelet mullite and highly crystalline cristobalite: 3 Si 3 Al 4 O 12 ⟶ 2 ( 3 Al 2 O 3 ⋅ 2 SiO 2 ) + 5 SiO 2 {\displaystyle...

Damby, David E.; Bowen, Leon (2012-11-19). "The structure of volcanic cristobalite in relation to its toxicity; relevance for the variable crystalline silica...

several crystalline forms of silica, SiO2. The most important forms of silica include: α-quartz, β-quartz, tridymite, cristobalite, coesite, and stishovite....

powdered metallic cobalt and nickel and crystalline silica (quartz, cristobalite and tridymite). Usually, physical carcinogens must get inside the body...

red-brown to green-brown Melting point 1670 °C (β tridymite) 1713 °C (β cristobalite) Solubility Insoluble at STP; 1 ppmmass at 400 °C and 500 lb/in2 to 2600 ppmmass...

In the 1930s, long-term occupational exposure among workers in the cristobalite diatomaceous earth industry who were exposed to high levels of airborne...

favored at elevated temperatures (above 870 °C) and it converts to β-cristobalite at 1,470 °C. However, tridymite does usually not form from pure β-quartz...

When heated, crystalline AlPO4 (berlinite) converts to tridymite and cristobalite forms, and this mirrors the behaviour of silicon dioxide. There are many...

200 °C catastrophic failure can occur due to the volume changes at the cristobalite inversion (around 225 °C) Steger's Crazing Test is a method for the assessment...

Volcanogenic constituents: Tuffites, volcanic ash, montmorillonite, cristobalite, zeolites Terrigenous constituents: Quartz, feldspars, rock fragments...

Cornubite Cornwallite Corundum Cotunnite Covellite Coyoteite Creedite Cristobalite Crocoite Cronstedtite Crookesite Crossite (not approved by IMA) Cryolite...

change into a variety of its SiO2 polymorphs, such as tridymite and cristobalite at high temperatures, and coesite at high pressures. Classifying minerals...

phenocrysts. The plagioclase is usually sodium-rich (oligoclase or andesine). Cristobalite and trydimite are sometimes present along with the quartz. Biotite, augite...

Nuclei of mouse embryonic stem cells in exiting pluripotent state α-Cristobalite. Certain states of crystalline materials: Li, Na, K, Cu, Rb, Ag, Fe,...

I41/a 89–98 Tetragonal trapezohedral 422 D4 224 [2,4]+ enantiomorphic cristobalite, wardite P422, P4212, P4122, P41212, P4222, P42212, P4322, P43212 I422...

certain physical reactions, including converting some of the quartz to cristobalite. After calcination the flint pebbles were crushed and milled to a fine...

to temperatures of 1,000–1,200 °C (1,830–2,190 °F) into enstatite and cristobalite; on the Mohs scale, this corresponds to an increase in hardness to 5...

inclusions, such as zircon, baddeleyite, chromite, rutile, corundum, cristobalite, and coesite. Microtektites, the fourth group of tektites, are less than...

produced from montmorillonite clay bodies due to the volume expansion of cristobalite during its inversion upon cooling. "The release of free silica, takes...