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Crystal Structure and Thermal Behavior of Rb2[B4O5(OH)4]·3.6H2O

✍ Scribed by M. Touboul; N. Penin; G. Nowogrocki

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
359 KB
Volume
149
Category
Article
ISSN
0022-4596

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✦ Synopsis

The crystal structure of synthetic Rb 2 [B 4 O 5 (OH) 4 ] ' 3.6H 2 O has been established from single-crystal X-ray di4raction data. It crystallizes in the orthorhombic space group Pbcn with a unit cell of dimensions a ‫؍‬ 11.276(5) A s , b ‫؍‬ 13.097(14) A s , c ‫؍‬ 16.751(5) A s ; V ‫؍‬ 2474(3) A s 3 ; Z ‫؍‬ 8. The structure was determined from 1201 independent re6ections and re5ned until R ‫؍‬ 0.049 and R w ‫؍‬ 0.036; it is composed of isolated [B 4 O 5 (OH) 4 ] 2؊ polyanions separated by free water molecules and Rb ؉ ions. Some of the positions of rubidium and oxygen atoms=the latter are attributed to water molecules=were localized with occupancy factors of 0.5 and 0.3. A similarity appears with the unit cell parameters of Cs 2 [B 4 O 5 (OH) 4 ] ' 3H 2 O:

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