Sinoite
A silicon oxynitride found in enstatite chondrites.
Key facts
- Formula
- Si2N2O
- Family
- Phosphides, carbides, nitrides and silicides
- Crystal system
- Orthorhombic
- First described
- the Jajh deh Kot Lalu enstatite chondrite, 1964
First found in a rock from space
Sinoite was described in 1964 from the Jajh deh Kot Lalu enstatite chondrite of Pakistan. Its name comes from its elements, silicon, nitrogen and oxygen. It is known only from meteorites.
What it is
Sinoite is a compound of silicon with nitrogen and oxygen. It forms only where nitrogen could bond to silicon, in rock extremely poor in oxygen.
Where it is found
It occurs in EL enstatite chondrites and some impact-melted enstatite rocks. Its formation is linked to heating, probably including melting by impacts.
How it is recognised
It forms colourless laths identified with a microprobe.
Did you know?
Did you know?
Silicon oxynitride is made industrially as a heat-resistant ceramic.
Did you know?
Sinoite is one of the few nitrogen minerals found in any rock.