Reactions between metal oxides and fluorides: some new double-fluoride structures of typeABF₃

Liquid-phase Synthesis of CaF₂ Particles and Their Low Refractive Index Characterization

“…Particles in the range of 15 to 80 nm were effectively produced; unfortunately, the use of KF affected the production of fluoro-perovskite materials (materials with K, Ca, and F components (KCaF3)). 7) Further, there is no mention included on the feasibility for the control of particle morphology, as well as their material performances. Fujiwara et al 8) and Grob et al 1) reported a development in the synthesis of fluoride material.…”

Standard x-ray diffraction powder patterns

“…KCaFs has been reported as cubic [Brisi, 1952] , as pseudocubic [Klasens et al, 1953] and as monoclinic [Ludekens and Welch, 1952] .…”

“…Brisi [1952] 8.742* Ludekens and Welch [1952] 8 [1939] Fischer [1965] NBS , sample at [Kelmers, 1961] References Evans, H. T. Jr., and S. Block (1966 [Ludekens and Welch, 1952].…”

“…20, 731 -733. Tutton, A.E.H. (1916 Harmsen [193 8] [Ludekens and Welch, 1952] Lattice constants a(A) Ludekens and Welch [1952] 4.523* Klasens et al [1953] 4 Monoclinic, P2i /a (14), Z=2. Isostructural with other "Tutton Salts" [Tutton and Porter, 1912] .…”

“…Lattice constants Ludekens and Welch [1952] Klasens el al. [1953] NBS, sample at 25°C Rudorff et al [1959] 4.062 Crocket and Haendler [1960] 4 [Gattow and Zemann, 1958] .…”