4 C + 6 SiO2 + 2 Ca3(PO4)2 → 4 CO + P4 + 6 CaSiO4

This is an oxidation-reduction (redox) reaction:

4 PV + 20 e- → 4 P0 (reduction)

4 C0 - 8 e- → 4 CII (oxidation)

6 SiIV - 12 e- → 6 SiVI (oxidation)

Ca3(PO4)2 is an oxidizing agent, C is a reducing agent, SiO2 is a reducing agent.

Reactants:

  • C
    • Names: Carbon black source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Acetylene black source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Channel black source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Odourless black pellets or extremely fine powder source: ICSC, accessed: 2019-09-04; Black, odorless solid. source: NIOSH NPG, accessed: 2019-09-02
  • SiO2
    • Ca3(PO4)2 – Tricalcium bis(phosphate) source: wikipedia, accessed: 2019-09-28
      • Other names: Tricalcium phosphate source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, Tribasic calcium phosphate source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, Bone phosphate of lime source: wikidata, accessed: 2019-09-02
      • Appearance: White amorphous powder source: wikipedia, accessed: 2019-09-28

    Products:

    • CO – Carbon monoxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
      • Other names: Carbon monooxide source: wikipedia, accessed: 2019-09-27, Carbonous oxide source: wikipedia, accessed: 2019-09-27, Carbon(II) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
      • Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless tasteless colourless compressed gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a nonliquefied or liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02
    • P4
    • CaSiO4