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单词 tetrahydrate
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tetrahydrate
tetrahydrate n.
Brit. /ˌtɛtrəˈhʌɪdreɪt/
,
U.S. /ˌtɛtrəˈhaɪˌdreɪt/
a hydrate containing four molecules of water.
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the world > matter > chemistry > chemical substances > named compounds > [noun] > water > compounds of hydrates > by number of water molecules
pentahydrate1842
trihydrate1854
tetrahydrate1886
1886 Jrnl. Chem. Soc. 49 418 The thermal reaction..is made up of two distinct quantities—(1) the decomposition of the trihydrate, (2) the formation of the tetrahydrate.
1951 C. Palache et al. Dana's Syst. Mineral. (ed. 7) II. 493 [Pentahydrite is] obtained in crystals together with the hexahydrate and tetrahydrate by evaporation..of a solution of magnesium sulfate.
1963 Acta Crystallogr. 16 376 (heading) Refinement of the structure of potassium pentaborate tetrahydrate.
extracted from tetra-comb. form
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