2 Ca(PO4)2 + 2 SiO2 + 14 C → P4 + 2 CaSiO3 + 14 CO

This is an oxidation-reduction (redox) reaction:

4 PVII + 28 e- → 4 P0 (reduction)

14 C0 - 28 e- → 14 CII (oxidation)

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

Reactants:

  • Ca(PO4)2
  • SiO2
    • 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

    Products:

    • P4
    • CaSiO3 – Calcium silicate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Dicalcium silicate source: wikipedia, accessed: 2019-09-27
      • Other names: Belite source: wikipedia, accessed: 2019-09-27, Silicic acid, calcium salt (non-fibrous, <1% crystalline silica) source: ICSC, accessed: 2019-09-04, Calcium hydrosilicate source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
      • Appearance: White crystals source: wikipedia, accessed: 2019-09-27; White powder source: ICSC, accessed: 2019-09-04; White or cream-colored, free-flowing powder. [Note: The commercial product is prepared from diatomaceous earth & lime.] source: NIOSH NPG, accessed: 2019-09-02
    • 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