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Einkristalle des Cer(III)‐Borosilicats Ce 3 [BSiO 6 ][SiO 4 ]
Author(s) -
MüllerBunz Helge,
Grossholz Hagen,
Schleid Thomas
Publication year - 2001
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200107)627:7<1436::aid-zaac1436>3.0.co;2-#
Subject(s) - materials science
Single Crystals of the Cerium(III) Borosilicate Ce 3 [BSiO 6 ][SiO 4 ] Colorless, lath‐shaped single crystals of Ce 3 [BSiO 6 ]‐ [SiO 4 ] (orthorhombic, Pbca; a = 990.07(6), b = 720.36(4), c = 2329.2(2) pm, Z = 8) were obtained in attempts to synthesize fluoride borates with trivalent cerium in evacuated silica tubes by reaction of educt mixtures of elemental cerium, cerium dioxide, cerium trifluoride, and boron sesquioxide (Ce, CeO 2 , CeF 3 , B 2 O 3 ; molar ratio 3 : 1 : 3 : 3) in fluxing CsCl (700 °C, 7 d) with the glass wall. The crystal structure contains eight‐ (Ce1) and ninefold coordinated Ce 3+ cations (Ce2 and Ce3) surrounded by oxygen atoms. Charge balance is achieved by both discrete borosilicate ([BSiO 6 ] 5– ≡ [O 2 BOSiO 3 ] 5– ) and ortho ‐silicate anions ([SiO 4 ] 4– ). The former consists of a [BO 3 ] triangle linked to a [SiO 4 ] tetrahedron by a single vertex. The anions form layers in [001] direction alternatingly built up from [BSiO 6 ] 5– and [SiO 4 ] 4– groups while Ce 3+ cations are located in between.