Simple metal containing carbides and nitrides

There are few/no natural mineral examples for these compounds.
This is likely because all these compounds are in a highly reduced stated and some of them are
not even capable of forming a protective macroscale passivation layer.

Awesome compounds

Titanium:

• TiC Titanium carbide – and ZrC Zirconum carbide
• TiN Titanium nitride

Silicon (counting silicon as metal here):

• SiC Silicon carbide
• Si₃N₄ Silicon nitride [1]

For more awesome compounds see: Base materials with high potential

Compounds that need to be sealed in PPV to be usable

Iron:

• Fe₃C Iron carbide aka cementite aka iron cohenite – ortorhombic – Mohs 5.5 to 6.0 – 7.20 to 7.65g/ccm – metallic luster
• Iron nitrides – Wikipedia: "Group 7 and group 8 transition metals form nitrides that decompose at relatively low temperatures" Fe₂N 400°C

Aluminum:

• Al₄C₃ Aluminum carbide [2] – hydrolyses in contact with water
• AlN [3] – hydrolyses in contact with water – it's a diamond like compound (a III-VI semiconductor) – highly covalent character

Calcium:

• CaC₂ Calcium carbide [4] – must be kept dry – releases ethyne on contact with water
• Ca₃N₂ calcium nitride [5] – highly reactive with water

Magnesium:

• Mg₃N_2(s) Magnesium nitide [6] – reacts with water
• Magnesium carbide ??

Related

• Refractory compound