a white microcrystalline mineral consisting of silica and occurring in volcanic rocks. Formula: SiO2
Word origin
C19: from German, named after Cerro San Cristóbal, Mexico, where it was discovered
Examples of 'cristobalite' in a sentence
cristobalite
Silica presented both amorphous and crystalline (cristobalite and quartz) structure.
Marcos O. de Paula, Ilda de F. F. Tinôco, Conrado de S. Rodrigues, Elizabeth N. daSilva, Cecília de F. Souza 2009, 'Potencial da cinza do bagaço da cana-de-açúcar como material de substituição parcialde cimento Portland Potential of sugarcane bagasse ash as a partial replacement materialfor Portland cement', Revista Brasileira de Engenharia Agrícola e Ambiental - Agriambihttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000300019. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Finally, the waters are undersaturated in cristobalite, anhydrite and fluorite.
Padilla Benítez, A., Pulido Bosch, A., Cerón García, J. C. 1993, 'Caracterización hidroquímica y análisis de los estados de equilibriotermodinámico en aguas termominerales de Alhama de Murcia (Murcia, Espana)',Estudios Geologicoshttp://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/337/341. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The minority phases, such as dickite, kaolinite, and cristobalite, were observed in both zones.
L. M. Romero-Guerrero, R. Moreno-Tovar, A. Arenas-Flores, Y. Marmolejo Santillán,F. Pérez-Moreno 2018, 'Chemical, Mineralogical, and Refractory Characterization of Kaolin in the Regionsof Huayacocotla-Alumbres, Mexico', Advances in Materials Science and Engineeringhttp://dx.doi.org/10.1155/2018/8156812. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Decreasing the silica particles size lowers the cristobalite crystallization temperature and the a-cordierite formation temperature.
LJILJANA KOSTIC-GVOZDENOVIC, SLAVICA ZEC, BRANISLAVA BOZOVIC, DJORDJE JANACKOVIC,RADA PETROVIC 2001, 'Densification and crystallization behaviour of colloidal cordierite-type gels', Journal of the Serbian Chemical Societyhttp://www.shd.org.yu/HtDocs/SHD/Vol66/No5/v66-no5-06.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Most cristobalite-bearing ash particles contain adhered materials such as feldspar and glass.
Horwell Claire J, Williamson Benedict J, Donaldson Ken, Le Blond Jennifer S, DambyDavid E, Bowen Leon 2012, 'The structure of volcanic cristobalite in relation to its toxicity; relevance forthe variable crystalline silica hazard', Particle and Fibre Toxicologyhttp://www.particleandfibretoxicology.com/content/9/1/44. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The main new crystalline phase was mullite associated with quartz, anatase and cristobalitefor all heating rates.
D. Njoya, F.S. Tadjuidje, E.J.A. Ndzana, A. Pountouonchi, N. Tessier-Doyen, G. Lecomte-Nana 2017, 'Effect of flux content and heating rate on the microstructure and technological propertiesof Mayouom (Western-Cameroon) kaolinite clay based ceramics', Journal of Asian Ceramic Societieshttp://www.sciencedirect.com/science/article/pii/S2187076417301306. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Experimental measurements of elastic properties of tridymite and cristobalite, including high-temperature measurements, are identified as a desideratum of future research.
Pabst W., Gregorová E. 2013, 'ELASTIC PROPERTIES OF SILICA POLYMORPHS – A REVIEW', Ceramics-Silikátyhttp://www.ceramics-silikaty.cz/2013/pdf/2013_03_167.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The mineral phases, such as aragonite, barite, chalcedony, cristobalite, vaterite, and amorphous silicon dioxide are in equilibrium.
D. A. Novikov, A. F. Sukhorukova, T. V. Korneeva 2018, 'Hydrogeology and hydrogeochemistry of the Zaeltsovsko-Mochishchensky zone of radonwaters in the southern West Siberia', Geodinamika i Tektonofizikahttps://www.gt-crust.ru/jour/article/view/680. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)