21784-78-1

Stoichiometric quantities of NiO and SiO2 heated to 1500° combine to give green Ni2SiC>4 with the olivine structure ; a green transparent spinel phase is obtained from this at higher temperatures and under pressure. A green hydrated silicate NiSiO3?xH20 (x = 1-3) is precipitated from nickel(II) solutions by Na2SiO3.