Growth of single crystals of NaCl in Gels

Abstract

The growth of transparent single crystals of sodium chloride (NaCl) in agar and silica gels up to 4 x 4 x 4 mm size is reported. A brief description of the material preparation, growth procedure and crystal nucleation is given. Hydrochloric acid was used to crystallize NaCl incorporated in the gel which reduces the solubility of NaCl in the gel media. Crystalline perfection has been studied using the chemical etching method.Es wird iiber das Wachstum von transparenten NaC1-Kristallen (bis zu 4 x 4 x 4 mm GroBe) in Agar-und Silicagel berichtet. Dazu erfolgt eine kurze Beschreibung der Materialvorbereitung, des Wachstumsvorganges und der Keimbildung. ChlorwasserstoffsLure verringerte die Loslichkeit von NaCl im Gel. Die Kristallperfektion wurde mit Hilfe des chemischen Atzens untersucht.

Gel network incorporation into single-crystals: effects of gel structures and crystal–gel interaction

“…NaCl in silica gel. 37 NaCl (30 w/v% Sinopharm Chemical Reagent purity ≥99.5%) was dissolved in the silica sols (concentrations of sodium metasilicate pentahydrate: 9.0 w/v% and 18.0 w/v%). Then 10 mL of each sol was filtered (syringe filter; 0.7 μm, Glass Fibre, iLab) into a 20 mL vial.…”

Comparison of sodium chloride hopper cubes grown under microgravity and terrestrial conditions

“…Silicagel containing the NaCl solution was supersaturated by the diffusion of hydrochloric acid (HCl) into the silicagel. 22 The silicagel network within the brine was found not to be integrated into the NaCl crystal structure. 23 The degree of supersaturation depends on the concentration of HCl.…”

Synthesis, characterization and properties of ferroelectric rubidium hydrogen tartrate single crystals

“…Gel media offers an efficient and simple technique for their growth. Recently a variety of crystals such as KDP or ADP (Lefaucheux et al 1982), PbHPO 4 (Desai and Ramana 1987), NaC1, KCI (Desai and Rai 1980) and also metallic crystals like Ag and Cu (Blank 1971) have been grown using gel medium.…”