(ˈɑːvɛdsəˌnaɪt) na type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
arfvedsonite
arfvedsonite
[′är·vəd·sə‚nīt] (mineralogy) A black monoclinic amphibole, containing sodium and silicon trioxide with occluded water and some calcium. Also known as soda hornblende.