Growth of R 1 − y Sr y F3 − y crystals with rare earth elements of the cerium subgroup (R = La, Ce, Pr, or Nd; 0 ≤ y ≤ 0.16) and the dependence of their density and optical characteristics on composition

Linear correlation of crystal structure and spectral properties of Nd3+ in Ca1‐xSrxF2 mixed crystals

“…However, with the concentration of Sr 2+ ion varied from 0% to 100%, the diffraction line of (111) plane shifted to lower angles and linear correlation is presented in Figure B. As can be seen, not only the diffraction lines, but linear dependence of density on composition was also observed, which is consistent with that of R 1‐ x Sr x F 3‐ x solid solutions . The character of linear correlation was due to the radius mismatch of Ca 2+ (0.99 Å) and Sr 2+ (1.12 Å), as well as the lattice mismatch of CaF 2 (5.46295 Å) and SrF 2 (5.86400 Å).…”

La1–yBayF3–y Solid Solution Crystals as an Effective Solid Electrolyte: Growth and Properties

“…The known data for some other tysonite-type R 1-y M y F 3-y crystals are shown for comparison. The La 1-y Ba y F 3-y crystals were similar in refractive properties to other isostructural La 1-y M y F 3-y crystals (M = Ca, Sr, Ba) [17].…”

“…The known data for some other tysonite-type R1-yMyF3-y crystals are shown for comparison. The La1-yBayF3y crystals were similar in refractive properties to other isostructural La1-yMyF3-y crystals (М= Ca, Sr, Ba) [17]. The density of La1-yBayF3-y samples quadratically decreased in the range from 5.917(5) to 5.741(5) g/cm 3 with an increase in the fraction of y from 0 to 0.08 (Figure 3b) and exceeded the density of fluorite-type Ba1-xLaxF2+x single crystals.…”

“…Bulk R 1-y M y F 3-y (R = La-Lu, Y, and M = Ca, Sr, Ba) crystals are usually grown by melt crystallization methods, predominantly the Bridgman-Stockbarger method [17,18] or Czochralski method. [19,20].…”

“…Until now, there are few studies on growing concentrated tysonite-type fluoride solid solutions. Only the possibility of growing crystals of R 1-y Sr y F 3-y (R = La-Nd (0 ≤ y ≤ 0.16)) tysonite solid solutions, which are isostructural to La 1-y Ba y F 3-y crystals, have been studied [17,32]. These SrF 2 -containing solid solutions have an important advantage for crystallization from a melt-congruent compositions corresponding to a singular point (temperature maximum) on the liquidus curve.…”