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Updated: Sep 20, 2026

Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures
Published on: June 28, 2017
A simplified measurement of hydrated crystal densities of low melting points (low transition points) by
Kazuhito Kajiwara1, Kazuyoshi Yabe, Takusei Hashitani
1Department of Biosciences, Teikyo University of Science and Technology, Yamanashi, Japan.
Abstract:
A volume change method for measuring crystal densities is described. It allows the densities of unstable hydrated crystals at room temperature to be determined, by measurements of volume changes during the solidification of aqueous solutions. NaCl x 2H2O, KCl, MgSO4 x 12H2O and K2HPO4 x 6H2O were measured by the method and their densities (SE) are 1.61+/-0.02, 1.99+/-0.05, 1.45+/-0.01 and 1.75+/-0.02 g ml(-1) respectively. Data of NaCl x 2H2O and KCl are in good agreement with the previously reported values.
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