Neptunium monocarbide

Neptunium monocarbide is a binary compound of neptunium metal and carbon with the chemical formula NpC.

Preparation
Heating of freshly obtained neptunium hydride with carbon at 1400 °C:
 * NpHx + C -> NpC + (x/2)H2↑

Physical properties
The compound forms black-grey crystals of cubic crystal system, spatial group Fm3m.