6 Ca + P4 → 2 Ca3P2

This is an oxidation-reduction (redox) reaction:

4 P0 + 12 e- → 4 P-III (reduction)

6 Ca0 - 12 e- → 6 CaII (oxidation)

P4 is an oxidizing agent, Ca is a reducing agent.

Reactants:

  • Ca
    • Names: Calcium source: wikidata, accessed: 2019-09-07, Calcium (powder) source: ICSC, accessed: 2019-09-04, Ca source: wikidata, accessed: 2019-09-07
    • Appearance: Silvery-white-to-grey powder source: ICSC, accessed: 2019-09-04
  • P4

Products:

  • Ca3P2 – Calcium phosphide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Photophor source: wikipedia, accessed: 2019-09-27, CP source: wikipedia, accessed: 2019-09-27, Polythanol source: wikipedia, accessed: 2019-09-27, Tricalcium diphosphide source: wikidata, accessed: 2019-09-02
    • Appearance: Red-brown crystalline powder or grey lumps source: wikipedia, accessed: 2019-09-27; Red-brown crystalline powder or grey lumps source: ICSC, accessed: 2019-09-04