the world > the earth > minerals > types of mineral > nitrates > [noun] > calcium nitrate
nitrocalcite1835
wall-saltpetre1911
1911 Encycl. Brit. XXIV. 94/2Wall-saltpetre or lime saltpetre, calcium nitrate, Ca (NO2)2, is found as an efflorescence on the walls of stables; it is now manufactured in large quantities.