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Answer for the clue "A source of phosphorus ", 7 letters:
apatite

Alternative clues for the word apatite

Word definitions for apatite in dictionaries

WordNet Word definitions in WordNet
n. a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus

Wikipedia Word definitions in Wikipedia
Apatite is a group of phosphate minerals , usually referring to hydroxylapatite , fluorapatite and chlorapatite , with high concentrations of OH , F and Cl ions , respectively, in the crystal . The formula of the admixture of the four most common endmembers ...

Wiktionary Word definitions in Wiktionary
n. (context mineral English) A calcium fluoride phosphate of variable composition, sometimes used in the manufacture of fertilizer.

Usage examples of apatite.

Inside the wet tissues of the body, the two chemicals react, and they precipitate hydroxyl apatite, a tough, rigid, natural constituent of actual human bone.

They located two roads, neither passable by now, one track leading to a shallow pit where many tons of apatite had been removed.

Canada it occurs with apatite in pyroxene rocks which are intrusive in Laurentian gneisses and crystalline limestones, the principal mining district being in Ottawa county in Quebec and near Burgess in Lanark county, Ontario.

Kemjawi as a byproduct of feldspar mining, and phlogopite at Siilinjarvi from an apatite mine.