▁Vic ▁Leg ley ▁( 1 9 1 5 - 1 9 9 4 ) ▁▁ 5 . ▁ 1 9 9 2 ▁- ▁ 2 0 1 0 ▁: ▁Jacques ▁Led uc ▁( compos er ) ▁( 1 9 3 2 - 2 0 1 6 ) ▁▁ 6 . ▁ 2 0 1 0 ▁- ▁▁▁▁▁▁▁▁▁ ▁: ▁Carl ▁Ver bra eken ▁( 1 9 5 0 - ▁) ▁▁ ▁Dutch ▁speaking ▁members ~ : ▁ ▁Marcel ▁De ▁J ong he , ▁Marc ▁Matth ys , ▁Pi eter ▁Sch u erm ans , ▁Luc ▁van ▁H ove , ▁Carl ▁Ver bra eken ▁and ▁Wil fried ▁West er lin ck . ▁ ▁French ▁speaking ▁members ▁: ▁ ▁Daniel le ▁Ba as , ▁Ren ier ▁D out re le pont , ▁Robert ▁J ans sens , ▁Viv iane ▁M ata igne ▁and ▁Felix ▁S ny ers . ▁ ▁External ▁links ▁ ▁Category : Music - related ▁professional ▁associations ▁Category : Music ▁organis ations ▁based ▁in ▁Belg ium <0x0A> </s> ▁K als il ite ▁( K Al Si O 4 ) ▁is ▁a ▁vit re ous ▁white ▁to ▁grey ▁f eld sp ath oid al ▁min eral ▁that ▁is ▁found ▁in ▁some ▁pot ass ium - rich ▁la vas , ▁such ▁as ▁from ▁Cham engo ▁Cr ater ▁in ▁U g anda . ▁It ▁has ▁a ▁relative ▁hard ness ▁of ▁ 5 . 5 . ▁ ▁References ▁▁ ▁Mind at . org ▁ ▁Web min eral . com ▁ ▁Hand book ▁of ▁Min eral ogy ▁ ▁Category