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STACK CRYSTAL-CHEMISTRY
DOI:10.1021/cm00047a022.png)
摘要
En 中文
The crystal chemistry of the STACK family of orthoborates having the nominal formula A6MM'(BO3)6 where A = Sr, Ba, Pb, or Ln (Ln = lanthanide), and M, M' = +2, +3, or +4 metal cation is described. Over 150 individual members of the family have been synthesized; they crystallize in the trigonal space group R3BAR with unit-cell volumes ranging from 1143.8(1) to 1365.6(3) angstrom3. In this report, the metal site preferences, disorder, and solid solubility of these phases are discussed. Interrelationships between this structure and the layered structure type of Ba3Sc(BO3)3 are also detailed.
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