Neptunium silicide

Template:Chembox Neptunium silicide is a binary inorganic compound of neptunium and silicon with the chemical formula Template:Chem. The compound forms crystals and does not dissolve in water.

Synthesis

Heating neptunium trifluoride with powdered silicon in vacuum:

$\mathrm{𝟦}𝖭𝗉{𝖥}_{\mathrm{𝟥}}\mathsf{+}\mathrm{𝟣}\mathrm{𝟣}𝖲𝗂\stackrel{1500^{o}C}{\to }\mathrm{𝟦}𝖭𝗉𝖲{𝗂}_{\mathrm{𝟤}}\mathsf{+}\mathrm{𝟥}𝖲𝗂{𝖥}_{\mathrm{𝟦}}$

Physical properties

Neptunium silicide forms crystals of tetragonal crystal system, space group I4₁/amd, cell parameters: a = 0.396 nm, c = 1.367 nm, Z = 4.

Neptunium disilicide does not dissolve in water.

Chemical properties

Neptunium disilicide reacts with HCl:

$𝖭𝗉𝖲{𝗂}_{\mathrm{𝟤}}\mathsf{+}\mathrm{𝟪}𝖧𝖢𝗅\stackrel{}{\to }𝖭𝗉𝖢{𝗅}_{\mathrm{𝟦}}\mathsf{+}\mathrm{𝟤}𝖲𝗂{𝖧}_{\mathrm{𝟦}}$