| Roaldite | |
| Imasymbol: | Roa[1] |
| Strunz: | 1.BC.05 |
| Dana: | 1.1.18.2 |
| System: | Cubic |
| Class: | Hextetrahedral (3m) H–M Symbol: (3m) |
| Symmetry: | P3m (no. 215) |
| Unit Cell: | a = 3.79 Å; Z = 1 |
| Colour: | Tin-white |
| Habit: | Platelets in kamacite |
| Mohs: | 5.5-6.5 |
| Lustre: | Metallic |
| Diaphaneity: | Opaque |
| Gravity: | 7.21 |
| Opticalprop: | Isotropic |
| References: | [2] [3] |
Roaldite is a rare meteorite mineral containing iron, nickel and nitrogen. Its chemical formula is .
It was first described in 1981 for an occurrence in the Youngedin meteorite, Avon, Western Australia. It was named after Roald Norbach Nielsen (born 1928), a Danish expert in electron microprobe. The mineral has also been reported from the Jerslev meteorite, Sjaelland, Denmark, and the Canyon Diablo meteorite of Meteor Crater in Arizona.[2]