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Scientific article
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Powder diffraction refinement of cubic and rhombohedral iron iodine boracite, Fe3B7O13I

ContributorsKubel, Frank
Published inFerroelectrics, vol. 160, no. 1, p. 61-65
Publication date1994
Abstract

Structural parameters of iron iodine boracite, Fe3B7O13I, [cubic with space group F[image omitted]3c at 373 K, lattice parameters acub = 12.22869(18) Å; rhombohedral with space group R3c at 10 K, lattice parameters ahex = 8.64534(21) and chex = 21.2035(8) Å] was refined from X-ray powder diffraction data; Rprofile = 2.4% (373 K) and 3.0% (10 K). For precise lattice parameter determination, the structure at low temperature was refined by using a sample with silicon as reference. The refinements show that the (averaged) difference between the two iron iodine distances increases from cubic → orthorhombic → rhombohedral structure from 0 Å → 0.20(1) ↠ 0.32(4) Å, respectively.

Keywords
  • Boracite
  • Powder diffraction
  • Phase transition
Citation (ISO format)
KUBEL, Frank. Powder diffraction refinement of cubic and rhombohedral iron iodine boracite, Fe<sub>3</sub>B<sub>7</sub>O<sub>13</sub>I. In: Ferroelectrics, 1994, vol. 160, n° 1, p. 61–65. doi: 10.1080/00150199408007695
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ISSN of the journal0015-0193
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