keatite Min.
(ˈkiːtaɪt)
[f. the name of P. P. Keat (born 1923), U.S. chemist who first synthesized it + -ite1.]
An artificial modification of silica produced at high pressures as tetragonal crystals.
| 1954 [see coesite]. 1955 Trans. Brit. Ceramic Soc. LIV. 665 The polymerized silicic acid now crystallizes..to the crystalline tetragonal phase, keatite. 1959 Zeitschr. für Kristallogr. CXII. 410 The density of keatite (50 /gr·cm3) is intermediate to that of cristobalite..and quartz. 1962 C. Frondel Dana's Syst. Min. (ed. 7) III. 308 Keatite has been synthesized by heating commercial dried silica..in water containing an alkali. |