Optical anomaly in artificial cubic hieratite, K2[SiF6]

Ole F. Göbel, Johan E. ten Elshof, Werner Kaminsky, Matthias Hannss

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Crystals of K2[SiF6] were grown in agar gel, silica gel and jelly. Crystals grown in agar gel or jelly exhibit birefringence and consist of six double refracting growth sectors, each having the shape of a tetragonal pyramid. Nevertheless, the structure of the crystals from agar gel could be refined as cubic (space group Fm\bar{3}m) with a weighted R factor of 0.043. The amount of birefringence was estimated by the Senarmont compensation method and the rotating polarizer method
Original languageEnglish
Pages (from-to)328-333
Number of pages6
JournalActa crystallographica. Section B: Structural science, crystal engineering and materials
Publication statusPublished - 2015


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