Matyhite
The iron-bearing partner of merrillite, found in the D'Orbigny angrite.
Key facts
- Formula
- Ca9(Ca0.5□0.5)Fe(PO4)7
- Family
- Phosphates
- Crystal system
- Trigonal
- First described
- the D'Orbigny angrite, 2018
First found in a rock from space
Matyhite was described in 2018 from the D'Orbigny angrite. It is known only from meteorites.
What it is
Matyhite has the structure of merrillite, the common calcium phosphate of meteorites, but with iron in the site that merrillite fills with magnesium. Some sites in its structure are left empty, shown by the small square in its formula.
Where it is found
It occurs at grain boundaries in the D'Orbigny angrite, together with tsangpoite and kuratite.
How it is recognised
It is identified by microprobe analysis and electron backscatter diffraction.
Did you know?
Did you know?
Merrillite-type phosphates are the main home of rare earth elements in many meteorites.
Did you know?
D'Orbigny is one of the largest angrites, with a mass of about 16 kilograms.