Wiktionary
gehlenite
n. (context mineral English) A particular kind of sorosilicate.
Wikipedia
Gehlenite
Gehlenite, (CaAl[AlSiO]), is a sorosilicate, Al-rich endmember of the melilite complete solid solution series with akermanite. The type locality is in the Monzoni Mountains, Fassa Valley in Trentino in Italy, and is named after Adolf Ferdinand Gehlen (1775–1815) by A.J. Fuchs in 1815.