| 释义 |
offretite Min.|ˈɒfrətaɪt|
Also † offrétite.
[ad. F. offrétite (F. Gonnard 1890, in Compt. Rend. CXI. 1002), f. the name of Albert Offret (b. 1857), French mineralogist: see -ite1.]
A hydrated aluminosilicate of potassium and calcium, which belongs to the zeolite group and is found as colourless hexagonal crystals at Mount Semiol, France.
1891Jrnl. Chem. Soc. LX. 407 Offrétite is a zeolite which occurs in very small quantity, associated with christianite and chabasite, in the basalt of Mount Simionse [sic], near Montbrison. 1892E. S. Dana Dana's Syst. Min. (ed. 6) 1043 Offrétite. 1894Amer. Jrnl. Sci. CXLVIII. 188 Offretite. 1967Nature 3 June 1005/2 Offretite and erionite are evidently two distinct but closely related minerals, which can intergrow. 1970Trans. Faraday Soc. LXVI. 1616 Synthetic unfaulted offretite can provide a wide pore molecular sieve which can sorb molecules up to ∼7·1 Å in critical dimension... This zeolite appears to have possibilities as a versatile molecular sieve. 1975Nature 28 Aug. 718/2 Offretite is a rare natural zeolite whose synthetic equivalent, zeolite O, is commercially important as a molecular sieve. |