phosgenite

[Gr. phōs =light; gennaō =to generate, and suff. -ite ( Min.).] Min.: A very rare mineral, occurring only in crystals, a ociated with galena. Crystallization, tetragonal. Hardne , 2.75-3; specific gravity, 6-6-31 luster, adamantine; color, white, gray, yellow; 6-631; streak, white; somewhat sectile; transparent to translucent. Composition: Carbonate of lead, 49; chloride of lead, 51-100, corresponding with the formula PbOCO2+PbCl. IMG:content-1000.png:[blocks in formation] Chem.: One of the acids which Zeise obtained by the action of phosphorus on acetone. phos-phăm, subst. [Pref. phosph, and English ammonia ). Chem.: PHN2. The nitrile of phosphoric acid obtained by pa ing ammonia gas over phosphorus pent a chloride, and heating the product in a stream of carbonic anhydride. When dry it is a white powder, but it soon changes to a reddish or yellow red forming color. ammonia Heated and with phosphoric water, it acid. is decomposed,