After rectification with water, or on keeping, this deposits rhombic crystals of camphor of cubebs.
2.
Heating a mixture of solid mercury ( II ) sulfate and sodium chloride also affords volatile HgCl 2, which sublimes and condenses in the form of small rhombic crystals.
3.
It is a salt that forms colorless or white water-soluble rhombic crystals and is soluble in water ( 108 g / 100 mL ) but less soluble in organic solvents.
4.
The first observation of polymorphism in organic materials is attributed to Friedrich W�hler and Justus von Liebig when in 1832 they examined a boiling solution of benzamide : upon cooling, the benzamide initially crystallised as silky needles, but when standing these were slowly replaced by rhombic crystals.
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