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...

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...

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

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...

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 –...

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

structure is related to that of cristobalite, a polymorphs of SiO2. This structural similarity of cadmium dicyanide and cristobalite was foundational in the development...

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...

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

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

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...

changes the low quartz structure into another structure similar with cristobalite. The specific structure of GaPO4 shows the arrangement of tetrahedrons...

obtained at pressure, the ordinary structure is isomorphous with the β-cristobalite, while subjecting it to high pressure is obtained a compound isomorphic...

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

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

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

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

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...

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...

Common mineral cements include calcite, quartz, and silica phases like cristobalite, iron oxides, and clay minerals; other mineral cements also occur. Cementation...

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...

the lowest at 2 × 10−14. The structure of solid BeF2 resembles that of cristobalite. Be2+ centers are four coordinate and tetrahedral and the fluoride centers...

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...

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

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