THOMAS DEERINCK, NCMIR / SCIENCE PHOTO LIBRARY THOMAS DEERINCK, NCMIR / SCIENCE PHOTO LIBRARY
Copper sulphate crystals, polarised light micrograph. This is hydrated copper (II) sulphate, which has the chemical formula CuSO4.5H2O. On a macroscopic scale, the crystals are a bright, intense blue.
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