alumina
Množina: aluminas
ETYM Latin alumen, aluminis. Related to Alum.
Oxide of aluminum.
Any of various forms of aluminum oxide occurring naturally as corundum; SYN. aluminum oxide, aluminium oxide.
Or corundum; Al2O3 oxide of aluminum, widely distributed in clays, slates, and shales. It is formed by the decomposition of the feldspars in granite and used as an abrasive. Typically it is a white powder, soluble in most strong acids or caustic alkalis but not in water. Impure alumina is called emery. Rubies and sapphires are corundum gemstones.
altruistic · altruistically · aludel · alum · alumina · aluminate · aluminium · aluminium foil · aluminize · aluminosilicate · aluminothermic · aluminothermy
aluminijum trioksid
IPA: / aluminijum trioksid /korund
IPA: / korund /Veoma tvrd mineral iste klase kao rubin i safir, upotrebljava se za čišćenje i glačanja metala (šmirgl). (lat.)
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