VISÉITE

vēˈzāˌīt noun

( -s )

Etymology: French, from Visé, town in Belgium, its locality + French -ite

: a mineral Ca 5 Al 10 (PO 4 ) 6 (SiO 4 ) 3 (OH) 10 .20-25H 2 O consisting of a hydrous hydroxide phosphate and silicate of aluminum and calcium