[{"from": "human", "value": "Could you give me a brief overview of this molecule? [P-3].[P-3].[Ca+2].[Ca+2].[Ca+2]"}, {"from": "gpt", "value": "The molecule appears as red-brown crystals to gray granular lumps. It reacts with water to form calcium hydroxide and phosphine, a flammable poisonous gas. Phosphine will normally ignite spontaneously in contact with air. If there is an excess of water this fire of phosphine will not normally ignite surrounding combustible material."}]