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

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Published in Ferroelectrics. 1994, vol. 160, no. 1, p. 61-65
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 BoracitePowder diffractionPhase transition
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KUBEL, Frank. Powder diffraction refinement of cubic and rhombohedral iron iodine boracite, Fe3B7O13I. In: Ferroelectrics, 1994, vol. 160, n° 1, p. 61-65. https://archive-ouverte.unige.ch/unige:80703

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Deposited on : 2016-02-17

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