Tb3Sn7: polymorphism and crystal structure of high-temperature modification

Oshchapovsky, I.; Pavlyuk, V.; Chumak, I.

doi:10.1107/S2052519213024378

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 5
Mechanism of polymorphic transformation: (a) type a and a′ networks in the structure of αTb₃Sn₇. Fragments limited by unit cell at x = 0 and x = ½ are selected; (b) type a′ and b networks in the structure of βTb₃Sn₇; (c) suggested mechanism of transformation of type a layers in αTb₃Sn₇ into type b layers in βTb₃Sn₇. Black discs – locations of Sn atoms in split positions favorable to the phase transition. Red discs encased in black – intermediate positions of Tb atoms. Small black arrows – path of Tb and Sn atoms during the phase transition.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 69| Part 6| October 2013| Pages 527-533

doi:10.1107/S2052519213024378

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