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Cristobalite (/krɪˈstoʊbəˌlaɪt/) is a
mineral polymorph of
silica that is
formed at very high temperatures. It has the same
chemical formula as quartz...
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found naturally occurring as quartz,
tridymite (high-temperature form),
cristobalite (high-temperature form),
stishovite (high-pressure form), and coesite...
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polymorphs of
cristobalite and / or tridymite.
These polymorphs also
experience temperature-induced inversions. The
inversion of
cristobalite at 220 °C can...
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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...
- 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...
- small, white,
radially clustered crystals (spherulites) of the
mineral cristobalite in the
black gl****
produce a
blotchy or
snowflake pattern (snowflake...
- include: 3D-Silicates,
quartz family Quartz – SiO2
Tridymite – SiO2
Cristobalite – SiO2
Coesite – SiO2
Stishovite – SiO2
Moganite – SiO2
Chalcedony –...
- the
temperature of formation. The main
three polymorphs are quartz,
cristobalite, and tridymite.
Quartz is the
second most
common mineral in the world...
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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...
- pigeonite. The groundm****
contains interstitial quartz or
tridymite or
cristobalite.
Olivine tholeiitic basalt has
augite and
orthopyroxene or pigeonite...
