Melilite, a lime-alumina-silicate, is characteristic of certain very basic rocks, the melilite-basalts.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3" by Various
Gehlenite is a silicate of the melilite group with a high condensation temperatures (∼ 1735 K for melilite, see Hutchison 2004).
On the Anomalous Silicate Absorption Feature of the Prototypical Seyfert 2 Galaxy NGC 1068
As a starting point for the dust composition amorphous melilite, amorphous olivine and crystalline magnesiowustite, respectively f4 , f5 and f6 ,were chosen.
Fitting of dust spectra with genetic algorithms - I. Perspectives & Limitations