ˈəsiŋˌīt noun
( -s )
Etymology: Danish ussingit, from Niels V. Ussing died 1911 Danish mineralogist + Danish -it -ite
: a mineral Na 2 AlSi 3 O 8 (OH) consisting of a basic sodium aluminum silicate related to the zeolites and occurring in reddish violet masses (hardness 6-7, specific gravity 2.5)