Heating calcium with silicon, phosphorus, or graphite in the absence of air gives calcium silicides (Ca 2 Si, CaSi, and CaSi 2), calcium phosphide (Ca 3 P 2), and calcium carbide (CaC 2), respectively. Calcium forms intermetallicpounds with aluminum, silver, gold, copper, lithium, magnesium, lead, and tin. Production and uses.
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