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Silica mineral, polymorph of quartz
Cristobalite (/krɪˈstoʊbəlaɪt/ krist-OH-bə-lyte) is a mineral polymorph of silica that is formed at very high temperatures. It has the same chemical formula
Cristobalite
Oxide of silicon
found naturally occurring as quartz, tridymite (high-temperature form), cristobalite (high-temperature form), stishovite (high-pressure form), and coesite
Silicon_dioxide
polymorphs of cristobalite and / or tridymite. These polymorphs also experience temperature-induced inversions. The inversion of cristobalite at 220 °C can
Quartz_inversion
Hydrated amorphous form of silica
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
Opal
Type of crystal structure
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
Diamond_cubic
Naturally occurring volcanic glass
small, white, radially clustered crystals (spherulites) of the mineral cristobalite in the black glass produce a blotchy or snowflake pattern (snowflake
Obsidian
Occupational lung disease caused by inhalation of crystalline silica
the temperature of formation. The main three polymorphs are quartz, cristobalite, and tridymite. Quartz is the second most common mineral in the world
Silicosis
Longest English-language dictionary word
J.; Donaldson, Ken; et al. (2012-11-19). "The structure of volcanic cristobalite in relation to its toxicity; relevance for the variable crystalline silica
Pneumonoultramicroscopicsilicovolcanoconiosis
Pneumonoultramicroscopicsilicovolcanoconiosis
Mineral made of silicon and oxygen
sudden temperature changes that may damage the crystals. Tridymite and cristobalite are high-temperature polymorphs of SiO2 that occur in high-silica volcanic
Quartz
Magnesium- and iron-rich extrusive igneous rock
pigeonite. The groundmass contains interstitial quartz or tridymite or cristobalite. Olivine tholeiitic basalt has augite and orthopyroxene or pigeonite
Basalt
Group of diseases involving cell growth
powdered metallic cobalt and nickel and crystalline silica (quartz, cristobalite and tridymite). Usually, physical carcinogens must get inside the body
Cancer
Brown to black variety of quartz
red-brown to yellow-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
Smoky_quartz
Soft, siliceous sedimentary rock
health. In the 1930s, workers with long-term occupational exposure in the cristobalite diatomaceous earth industry who were exposed to high levels of airborne
Diatomaceous_earth
Phyllosilicate clay mineral
nucleates and transforms to platelet mullite and highly crystalline cristobalite: 3 Si3Al4O12 → 2 [ 3 Al2O3 · 2 SiO2 ] + 5 SiO2 Finally, at 1400 °C the
Kaolinite
Arm of the Indian Ocean between Asia and Africa
needed] Volcanogenic constituents Tuffites, volcanic ash, montmorillonite, cristobalite, zeolites Terrigenous constituents Quartz, feldspars, rock fragments
Red_Sea
Silica mineral, polymorph of quartz
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
Tridymite
Ordered arrangement of atoms, ions, or molecules in a crystalline material
several crystalline forms of silica, SiO2. The most important forms of silica include: α-quartz, β-quartz, tridymite, cristobalite, coesite, and stishovite.
Crystal_structure
Dense silica mineral
lunar meteorites, where it is presumably formed from either tridymite or cristobalite – other polymorphs of quartz – as a result of heating during the atmospheric
Seifertite
Chemical compound
pressure. There was also a claim to have made a silicon carbonate with a cristobalite structure, where both carbon and silicon are surrounded by four oxygen
Silicon_carbonate
Trigonal Uniaxial (+) 0.351 None Corundum Trigonal Uniaxial (-) 0.09 None Cristobalite Tetragonal (pseudoisometric) Uniaxial (-) 0.003 None Enstatite Orthorhombic
List of minerals by optical properties
List_of_minerals_by_optical_properties
Lattice point group
I41/a 89–98 Tetragonal trapezohedral 422 D4 224 [2,4]+ enantiomorphic cristobalite, wardite P422, P4212, P4122, P41212, P4222, P42212, P4322, P43212 I422
Tetragonal_crystal_system
Cryptocrystalline form of the mineral quartz
certain physical reactions, including converting some of the quartz to cristobalite. After calcination the flint pebbles were crushed and milled to a fine
Flint
Purple inorganic pigment
pigment, allows also the production of a week purple color, arising from cristobalite doped with AuNPs. The optical properties of the composites are explained
Purple_of_Cassius
Talc-bearing metamorphic rock
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
Soapstone
Banded variety of chalcedony
which consists of nanometer-sized crystals of the silica polymorphs cristobalite and tridymite and is therefore not truly amorphous. Fully amorphous opal-A
Agate
Cornubite Cornwallite Corundum Cotunnite Covellite Coyoteite Creedite Cristobalite Crocoite Cronstedtite Crookesite Crossite (not approved by IMA) Cryolite
List_of_minerals
Cracks in ceramics
produced from montmorillonite clay bodies due to the volume expansion of cristobalite during its inversion upon cooling. "The release of free silica, takes
Dunt
Type of volcanic rock
and leucite. Commonly in most felsic ignimbrites the quartz polymorphs cristobalite and tridymite are usually found within the welded tuffs and breccias
Ignimbrite
Process of chemical precipitation bonding sedimentary grains
Common mineral cements include calcite, quartz, and silica phases like cristobalite, iron oxides, and clay minerals; other mineral cements also occur. Cementation
Cementation_(geology)
Chemical compounds with at least one silicon atom
β-cristobalite at about 1470 °C, which once again exists metastably below this transition temperature and transforms at 200–280 °C to α-cristobalite via
Silicon_compounds
Classification
2012 2008 14808-60-7 Silica dust, crystalline, in the form of quartz or cristobalite Sup 7, 68, 100C 2012 2009 15262-20-1 Radium-228 and its decay products
IARC_group_1
Phyllosilicate clay mineral
derived from volcanic ash. It occurs together with allophane, quartz, cristobalite, gibbsite, vermiculite and limonite. Imogolite consists of a network
Imogolite
Rock-forming minerals with predominantly silicate anions
063 °F) β-quartz – hexagonal, high-temperature quartz Coesite – monoclinic Cristobalite – tetragonal Melanophlogite – cubic or tetragonal, rare Moganite – monoclinic
Silicate_mineral
Metamorphism resulting from combustion of coal or hydrocarbon deposits
cordierite, indialite, fayalite, mullite, tridymite and cristobalite (both tridymite and cristobalite may be classified as oxide minerals, too), and sekaninaite
Pyrometamorphism
Crystalline chemical element or compound formed by geologic processes
change into a variety of its SiO2 polymorphs, such as tridymite and cristobalite at high temperatures, and coesite at high pressures. Classifying minerals
Mineral
Igneous, volcanic rock, of felsic (silica-rich) composition
phenocrysts. The plagioclase is usually sodium-rich (oligoclase or andesine). Cristobalite and trydimite are sometimes present along with the quartz. Biotite, augite
Rhyolite
Geomorphological process
soils and colluvium up to 120-metre (394 ft) long with the presence of cristobalite, the high-temperature modification of quartz (1,713–18 °C or 3,115–64 °F)
Electromechanical disintegration
Electromechanical_disintegration
Natural material created during volcanic eruptions
known to cause silicosis. Minerals associated with this include quartz, cristobalite and tridymite, which may all be present in volcanic ash. These minerals
Volcanic_ash
County in California, United States
Cristobalite on obsidian, found near Lava Beds National Monument
Siskiyou_County,_California
Chemical compound
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
Beryllium_fluoride
Materials that have a negative Poisson's ratio
Nuclei of mouse embryonic stem cells in exiting pluripotent state α-Cristobalite. Certain states of crystalline materials: Li, Na, K, Cu, Rb, Ag, Fe,
Auxetics
Chemical compound
structure is related to that of cristobalite, a polymorphs of SiO2. This structural similarity of cadmium dicyanide and cristobalite was foundational in the development
Cadmium_cyanide
Gravel-sized glass beads formed from meteorite impacts
inclusions, such as zircon, baddeleyite, chromite, rutile, corundum, cristobalite, and coesite. Microtektites are less than 1 mm in size. They exhibit
Tektite
Rock dust covering the Moon
olivine, augite, orthopyroxene, pigeonite, ilmenite, chromite, quartz, cristobalite, and whitlockite. Glass is abundant in the Lunar regolith and forms as
Lunar_regolith
Phyllosilicate mineral in the kaolinite subgroup
10 TiO2, % 0.09 <0.05 CaO, % - - MgO, % - - K2O, % - <0.05 Na2O, % - <0.05 LOI, % 13.8 19.8 Halloysite, % 92 99.1 Cristobalite, % 4 - Quartz, % 1 0.1
Halloysite
Hard, fine-grained sedimentary rock composed of cryptocrystalline silica
microcrystalline form of silica composed mostly of bladed crystals of cristobalite and tridymite. Much opal-CT takes the form of lepispheres, which are
Chert
Chemical compound
When heated, crystalline AlPO4 (berlinite) converts to tridymite and cristobalite forms, and this mirrors the behaviour of silicon dioxide. There are many
Aluminium_phosphate
Lunar valley
volume % Plagioclase 22–45 20–50 Clinopyroxene 31–51 30–70 Olivine 0–7 0–10 Ilmenite/opaques 13–26 5–25 Cristobalite 0–6 – Spinel Trace – Glass Trace –
Taurus–Littrow
Process in petroleum processing
H2O Serpentine, acmite, gyrolite, gehlenite, amorphous silica, quartz, cristobalite, pectolite Aluminium oxy-hydroxides AlO(OH) Boehmite, gibbsite, diaspore
Oilfield_scale_inhibition
County in Colón, Panama
of a former Panama Railroad building known as the Washington House. Cristobalites eventually had their own commissary, post office, police, fire and railroad
Cristóbal,_Colón
for the production of sodium triphosphate, calcined petroleum coke and cristobalite. Patent application title: METHOD AND DEVICE FOR DRYING SHEETS OF DRYWALL
Grenzebach_BSH
Chemical compound
changes the low quartz structure into another structure similar with cristobalite. The specific structure of GaPO4 shows the arrangement of tetrahedrons
Gallium_phosphate
Exposure to dangerous levels of airborne contaminants
crystalline 25/50 mg/m3 - 14808607, carcinogenic substance (25 mg/m3 – cristobalite, tridymite; 50 mg/m3 – crystalline silica) 7440-22-4 0810 Silver 10 mg/m3
Immediately dangerous to life or health
Immediately_dangerous_to_life_or_health
Crimsonite Cms Cahnite Cah Cascandite Cas Chessexite Cex Clinohedrite Cnh Cristobalite Crs Cairncrossite Ccs Caseyite Csy Chesterite Chs Clinohumite Chu Crocobelonite
List_of_mineral_symbols
Scientific study of minerals and mineralised artifacts
in a hand sample, for example quartz and its polymorphs tridymite and cristobalite. Isomorphous minerals of different compositions have similar powder diffraction
Mineralogy
properties do not change upon 20-day annealing at 800 °C, but it converts to cristobalite after heating at temperatures above 900 °C. Melanophlogite is a rare
Melanophlogite
Silicate mineral
crystallization stage. It is associated with troilite, pyroxferroite, cristobalite and alkali feldspar. The mineral is nearly opaque and appears dark red-brown
Tranquillityite
Ability of a solid material to exist in more than one form or crystal structure
many polymorphs. Important ones include: α-quartz, β-quartz, tridymite, cristobalite, moganite, coesite, and stishovite. A classical example of polymorphism
Crystal_polymorphism
Class of chemical compounds
Praseodymium(V) oxide nitride PrON molecular Phosphoryl nitride PNO α-quartz, β-cristobalite, or moganite structure Titanium nickel oxynitride NiTiNO Chromium oxynitride
Oxynitride
Class of extreme chemical compounds
the unit cell, and given off again when pressure dropped to 11 GPa. Cristobalite He II (SiO2He) is stable between 1.7 and 6.4 GPa. It has a rhombohedral
Helium_compounds
Electronic oscillator circuit
transformation. Other phases, e.g. the higher-temperature phases tridymite and cristobalite, are not significant for oscillators. All quartz oscillator crystals
Crystal_oscillator
Single chain inosilicate mineral
Earth's crust, in association with clinopyroxene, plagioclase, ilmenite, cristobalite, tridymite, fayalite, fluorapatite and potassic feldspar, and forms series
Pyroxferroite
Sulfide mineral
include kamacite, troilite, schreibersite, clinoenstatite, tridymite, cristobalite, daubreelite, graphite, roedderite, alabandite, talnakhite, pentlandite
Djerfisherite
Opal is a valid IMA/CNMNC name but it is a mineraloid (a mixture of cristobalite and/or tridymite and amorphous silica), it has a page on Mindat.org and
List of minerals recognized by the International Mineralogical Association
List_of_minerals_recognized_by_the_International_Mineralogical_Association
Chemical compound
obtained at pressure, the ordinary structure is isomorphous with the β-cristobalite, while subjecting it to high pressure is obtained a compound isomorphic
Boron_phosphate
Modes in crystallography and materials science
vibrations or phonons that exist in network materials such as quartz, cristobalite or zirconium tungstate. Network materials can be described as three-dimensional
Rigid_unit_modes
Covalent chemical bond between silicon and oxygen atoms
The Si–O–Si angle is 144° in α-quartz, 155° in β-quartz, 147° in α-cristobalite and (153±20)° in vitreous silica. It is 180° in coesite (another polymorph
Silicon–oxygen_bond
Accumulation of unwanted material on solid surfaces
(serpentine, acmite, gyrolite, gehlenite, amorphous silica, quartz, cristobalite, pectolite, xonotlite); Aluminium oxide hydroxides (boehmite, gibbsite
Fouling
Volcanic mountain in Iran
down. Minerals formed by alteration processes include alunite, calcite, cristobalite, illite, jarosite, kaolinite, pyrophyllite, quartz, smectite, sulfur
Taftan_(volcano)
By-products of coal combustion
hematite, magnetite and/or maghemite. Other phases often identified are cristobalite, anhydrite, free lime, periclase, calcite, sylvite, halite, portlandite
Coal_combustion_products
Flaws in a ceramic glaze
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
Glaze_defects
Genetic changes leading to uncontrolled cell growth and tumor formation
powdered metallic cobalt and nickel, and crystalline silica (quartz, cristobalite, and tridymite). Usually, physical carcinogens must get inside the body
Causes_of_cancer
3262-13:1997 Part 13: Natural quartz (ground) ISO 3262-14:2000 Part 14: Cristobalite ISO 3262-15:2000 Part 15: Vitreous silica ISO 3262-16:2000 Part 16: Aluminium
List of ISO standards 3000–4999
List_of_ISO_standards_3000–4999
Volcanic mudflow in Washington, USA
clay and altered minerals like smectite, kaolinite, halloysite, mica, cristobalite, opal, and hematite in Osceola deposits with the same minerals in outcrops
Osceola_Mudflow
Active volcano in Los Lagos Region, Chile
Research (Solid Earth) 114, B04207 M Reich et al., 2009, Formation of cristobalite nanofibers during explosive volcanic eruptions, Geology 37, 435–438 Photography
Chaitén_(volcano)
System of detailed crystal structure classification
disulfide structure C8 β-SiO2 P6222 β-Quartz structure C9 β-Cristobalite Fd3m Idealized β-Cristobalite structure C10 β-Tridymite P63/mmc β-Tridymite structure
Strukturbericht_designation
Mudstone ridge slope in Gale Crater, Mars
minerals plus clays, though an intermediate horizon contains tridymite, cristobalite, quartz and opal. The Murray Formation has five named subunits, the Pahrump
Murray_Formation
Chemical compound
Dirac fermions in Cd3As2. Compared with other 3D TDSs, for example, β-cristobalite BiO 2 and Na3Bi, Cd3As2 is stable and has much higher Fermi velocities
Cadmium_arsenide
fumaroles of the Colima volcano in Mexico. Other minerals including cristobalite, arcanite, thenardite, baryte and native gold have been collected from
Colimaite
Metallurgical casting defect
additives which lower the temperature of silica transition to tridymite or cristobalite, or which sinter the sand increasing resistance to failure; or by organic
Veining_(metallurgy)
Lung condition caused by exposure to hazardous materials in a workplace
inhaling fine particles of silica, most commonly in the form of quartz or cristobalite. Short-term exposures of large amounts of silica or long-term (10 years
Occupational_lung_disease
Volcanologist and geohealth researcher
impurities on the in vitro toxicity and pro-inflammatory potential of cristobalite". Environmental Research. 159: 164–175. Bibcode:2017ER....159..164N.
Claire_Horwell
Chemical reaction damaging concrete
associated with silica mineralization and can also contain reactive cristobalite while oxy-hydroxides of Fe(III), in particular ferrihydrite, exhibit
Alkali–silica_reaction
Type of sedimentary rock
slowly commences to transform into opal CT (opal with crystallites of cristobalite and tridymite). With increasing temperature and pressure the transformation
Radiolarite
Japanese anime television series
Maskrock (Marbles) - A knight and guardian of the Rocks Mountain. Made of cristobalite. Carries an Impulsar weapon. Mecharock (Nuggit) - Multiple Mecharocks
Machine Robo: Revenge of Cronos
Machine_Robo:_Revenge_of_Cronos
Independent charity in UK
volcanic ash containing large amounts of the crystalline silica mineral cristobalite over the surrounding area. IOM scientists investigated the health of
Institute of Occupational Medicine
Institute_of_Occupational_Medicine
Volcano in Parinacota Province, Chile
magmas. Fumaroles have deposited minerals such as anhydrite, baryte, cristobalite, gypsum, quartz, sassolite and sulfur. Less common are galena, orpiment
Guallatiri
Tablemount in the Pacific Ocean
materials found on Horizon Guyot are analcime, barite, calcite, celadonite, cristobalite, glauconite, gypsum, ironstone, kaolinite, mica, montmorillonite, mudstone
Horizon_Guyot
Atomic-scale non-crystalline structure of liquids and glasses
SiO2) has a number of distinct crystalline forms: quartz, tridymite, cristobalite, and others (including the high pressure polymorphs stishovite and coesite)
Structure of liquids and glasses
Structure_of_liquids_and_glasses
Volcanic seamount north of New Zealand
minerals like alunite, amorphous silica, anhydrite, barite, chalcopyrite, cristobalite, magnetite, marcasite, natroalunite, natrojarosite, pyrite, pyrophyllite
Monowai_(seamount)
Failed rift of tectonic plates in the southern US
Group also contains high-temperature variations of vug-quartz such as β-cristobalite. This suggests that the parent magma of the Carlton Rhyolite was a high-temperature
Southern_Oklahoma_Aulacogen
Volcanic eruption in Chile
Centre reported that the ashes contain no crystal phases of quartz or cristobalite. On 9 June ash clouds from Puyehue reached Uruguay, forcing most flights
2011–2012 Puyehue-Cordón Caulle eruption
2011–2012_Puyehue-Cordón_Caulle_eruption
Island in New Zealand
of sulfuric acid has yielded aluminite, alunite, anhydrite, chlorite, cristobalite, diaspore, gibbsite, hematite, kaolinite, metahalloysite, natroalunite
Curtis_Island_(New_Zealand)
phyllosilicates, and tectosilicates. Tectosilicates such as quartz, and cristobalite are common in soils. Phyllosilicates are known as the sheet silicates
Primary_mineral
Municipal unit in Greece
in this region are primarily composed of HEU-type zeolite, feldspars, cristobalite, mica, clay minerals, and quartz. Specifically, the mineralogical composition
Metaxades
043] [no] [no] (IUPAC: lead diiron(III) dihydro diphosphate) Cristobalite (cristobalite: 1887) 4.DA.15 [1,044] [1,045] [1,046] (IUPAC: dioxosilicate)
List of minerals recognized by the International Mineralogical Association (C)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(C)
Geopark in Hidalgo, Mexico
in the Cerro de San Cristóbal de Pachuca geosite, of tridymite and cristobalite, minerals discovered by Gerhard vom Rath in the years 1868 and 1887,
Comarca_Minera_Geopark
Soviet/Russian physical chemist
In 1981 Shultz published paper on the optical fiber made out of pure cristobalite and silicone shell. M. Shultz is the founder of one of Russian scientific
Mikhail_Shultz
, 1961) 6.AC.15 [254] [255] [256] (IUPAC: tantalum borate) Behoite (cristobalite: IMA1969-031) 4.FA.05a [257] [258] [259] (IUPAC: beryllium dihydroxide)
List of minerals recognized by the International Mineralogical Association (B)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(B)
(IUPAC: tripotassium sodium tetracopper dioxo tetrasulfate) Wülfingite (cristobalite: IMA1983-070) 4.FA.10 [317] [318] [319] (IUPAC: zinc dihydroxide) Wupatkiite
List of minerals recognized by the International Mineralogical Association (W–X)
List_of_minerals_recognized_by_the_International_Mineralogical_Association_(W–X)
CRISTOBALITE
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