Difference between revisions of "Simple metal containing carbides and nitrides"
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| − | There are few/no natural mineral examples | + | There are few/no natural mineral examples for these compounds. <br> |
| − | are in a highly reduced stated and some not even capable of | + | This is likely because all these compounds are in a highly reduced stated and some of them are <br> |
| + | not even capable of forming a protective [[macroscale passivation layer]]. | ||
Titanium: | Titanium: | ||
Revision as of 13:30, 21 June 2021
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.
Titanium:
- TiC Titanium carbide – and ZrC Zirconum carbide
- TiN Titanium nitride
Silicon (counting silicon as metal here):
- SiC Sicicon carbide
- Si3N4 Silicon nitride [1]
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:
- Mg3N2(s) Magnesium nitide [6] – reacts with water
- Magnesium carbide ??
