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Free Content A simplified measurement of hydrated crystal densities of low melting points (low transition points) by solidifications of aqueous solutions

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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·2H2O, KCl, MgSO4·12H2O and K2HPO4·6H2O were measured by the method and their densities 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·2H2O and KCl are in good agreement with the previously reported values.

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Keywords: Density; Solidification of aqueous solutions; Unstable nydrated crystals; Volume change

Document Type: Research Article

Publication date: May 1, 2003

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  • CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation

    The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.

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