-ˌīt noun
( -s )
Etymology: German petalit, from Greek petalon leaf + German -it -ite
: a usually white mineral LiAl(Si 2 O 5 ) 2 consisting of a lithium aluminum silicate occurring in foliated cleavable masses or in monoclinic crystals (hardness 6-6.5, specific gravity 2.39-2.46)