TY - JOUR
T1 - Polymorphism, structures and phase transformation of K3[SO4]F
AU - Skakle, Janet M.S.
AU - Fletcher, James G.
AU - West, Anthony R.
PY - 1996/6/21
Y1 - 1996/6/21
N2 - The phase K3[SO4]F was found to be dimorphic, undergoing a reversible tetragonal (β) to cubic (α) phase transition at 585°C. The room-temperature polymorph, β-K3[SO4]F, is isostructural with Ba3SiO5, as confirmed by Rietveld refinement of X-ray powder diffraction data: a = 7.2961(5), c = 10.854(1) Å, R = 0.0689 and Rwp = 0.0907. The α form is cubic, a ≈ 5.43 Å, with probable space group Pm3m. Partial Rietveld refinement suggested that it has an anti-perovskite structure. Lattice parameter measurements as a function of temperature showed no discontinuity at the α-β transition, which is therefore suggested to be a displacive second-order transition.
AB - The phase K3[SO4]F was found to be dimorphic, undergoing a reversible tetragonal (β) to cubic (α) phase transition at 585°C. The room-temperature polymorph, β-K3[SO4]F, is isostructural with Ba3SiO5, as confirmed by Rietveld refinement of X-ray powder diffraction data: a = 7.2961(5), c = 10.854(1) Å, R = 0.0689 and Rwp = 0.0907. The α form is cubic, a ≈ 5.43 Å, with probable space group Pm3m. Partial Rietveld refinement suggested that it has an anti-perovskite structure. Lattice parameter measurements as a function of temperature showed no discontinuity at the α-β transition, which is therefore suggested to be a displacive second-order transition.
UR - http://www.scopus.com/inward/record.url?scp=33749084685&partnerID=8YFLogxK
U2 - 10.1039/dt9960002497
DO - 10.1039/dt9960002497
M3 - Article
AN - SCOPUS:33749084685
SN - 0300-9246
SP - 2497
EP - 2501
JO - Journal of the Chemical Society - Dalton Transactions
JF - Journal of the Chemical Society - Dalton Transactions
IS - 12
ER -