29.0 MB (3.4 MB compressed)
3900 x 2600 pixels
33.0 x 22.1 cm ⏐ 13.0 x 8.7 in (300dpi)
HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Phosphoric acid crystals. Polarised light micrograph of typical rhombus-shaped crystals of phosphoric acid (H3.PO4). Phosphoric acid is produced by adding sulphuric acid to calcium phosphate rock. Phosphoric acid is used in fertilisers, water softeners and as a food additive. Magnification: x280 when printed at 10 centimetres wide.
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