Examples of 'cristobalite' in a sentence
Meaning of "cristobalite"
cristobalite (noun) - Cristobalite is a mineral form of silica, commonly found in volcanic rocks and heated diatomaceous earth
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- A mineral of volcanic rocks that solidified at a high temperature. Cristobalite is chemically identical to quartz, with the chemical formula SiO₂, but has a different crystal structure. Crystals are always microscopic, and usually form small rounded masses.
How to use "cristobalite" in a sentence
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cristobalite
The latter is converted to cristobalite at high temperatures.
Cristobalite rosettes or shells on primary manganese silicate are an example.
The groundmass contains interstitial quartz or tridymite or cristobalite.
Cristobalite is an odd form of silica.
There is more than one form of the cristobalite framework.
Cristobalite is high purity silica having a narrow particle size distribution.
Much is known about quartz but less about cristobalite.
Ceramic fibers can be converted to cristobalite in very high temperature applications.
Cristobalite is scarce in nature.
Examples are tridymite and cristobalite.
Cristobalite is also formed when amorphous silica or vitreous silica is heated at high temperature.
Silica inhaled in the form of quartz or cristobalite from occupational.
Quartz and cristobalite are progressively converted into viscous liquid by alkali oxides diffusing into them.
Respirable particles of airborne quartz and of cristobalite constitute hazards to health.
Upon heating up to high temperatures the quartz will transform to tridymite and cristobalite.
See also
Made of cristobalite.
The aluminium phosphate used in the diene preparation need not be all cristobalite.
Cristobalite is found in volcanic sources almost always associated with the natural glass rock obsidian.
The present invention relates to a process for making a crystalline siliceous refractory mass comprising cristobalite.
Cristobalite inversion A sudden change in the physical structure of silica in its cristobalite phase.
The high furnace temperature and the firing transform the residual vitreous phase into cristobalite.
The cristobalite content of filtration agents obtained in accordance with the procedure is below 1 %.
Like test mass 1 the quartz was transformed to cristobalite.
The high-temperature forms of tridymite and cristobalite are known from silica-rich volcanic rocks.
The structure of solid BeF2 resembles that of cristobalite.
On the other hand, too large a cristobalite content in silica brick makes the structure instable.
The whitish inclusions consist of refractory minerals, such as cristobalite.
On 5 g of cristobalite and cross-linking it with glutaraldehyde.
It is associated with troilite, pyroxferroite, cristobalite and alkali feldspar.
In one embodiment, cristobalite content is measured by x-ray diffraction.
The three most common forms are quartz, tridymite and cristobalite.
In one exemplary method, cristobalite content is measured by x-ray diffraction.
The typical crystalline phases are corundum, mullite, cordierite and cristobalite.
In one embodiment, the cristobalite content is less than about 1 % by weight.
Piece according to claim 1, wherein the crystalline silica is in cristobalite or tridymite form.
The filter aid may have a cristobalite content of less than 20 % by weight.
Furthermore, the silica is present in the crystalline forms tridymite and cristobalite.
Products made by this method typically have cristobalite contents ranging from 5 to 40 % by weight.
At higher temperature, the synthetic mineral matrix will again reconfigure into cristobalite.
Assessment of exposure to quartz, cristobalite and silicon carbide fibres ( whiskers ) in a silicon carbide plant.
Among the preferred silica particles, one can use cristobalite or quartz.
Thus 20 % cristobalite represents a practical minimum figure.
Typically, the clay will have a high montmorillonite content and a low content of cristobalite and / or quartz.
Sand, quartz, cristobalite and precipitated or fused silica ;.
As produced, RCF is an amorphous material, and as such does not contain cristobalite.
In some embodiments, the cristobalite content is less than about 20 % by weight.
Content of other phases, mostly dense quarz - or cristobalite analogues.
After firing at 1100°C the silicas of the invention have a crystal structure of alpha cristobalite.
Examples of an SiO 2 polymorph are quartz a or B cristobalite a or B or tridymite ( a or B ).
After firing at 1100°C the silicas of the invention had a crystal structure of alpha cristobalite.
