0 6 ▁. ▁ ▁In ▁a ▁labor atory ▁setting , ▁ 3 D ▁gra in ▁maps ▁using ▁X - ray s ▁as ▁a ▁pro be ▁can ▁be ▁obtained ▁using ▁labor atory ▁diff raction ▁contrast ▁tom ography ▁( Lab D CT ), ▁a ▁technique ▁derived ▁from ▁ 3 D X R D . ▁ ▁See ▁also ▁▁ ▁D iff raction ▁ ▁D iff raction ▁Tom ography ▁ ▁Syn ch ro tr on ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Category : M icro sc opy ▁Category : X - ray ▁instrument ation <0x0A> </s> ▁Est our mel ▁is ▁a ▁commune ▁in ▁the ▁Nord ▁department ▁in ▁northern ▁France . ▁ ▁Her ald ry ▁ ▁Places ▁of ▁interest ▁It ▁is ▁well ▁known ▁by ▁the ▁families ▁of ▁the ▁Camb rai ▁area ▁for ▁its ▁pet ting ▁zoo , ▁Le ▁Par c ▁d ' Est our mel , ▁opened ▁in ▁ 1 9 6 7 ▁and ▁located ▁in ▁the ▁center ▁of ▁the ▁village . ▁It ▁covers ▁ 6 ▁hect ares . ▁ ▁See ▁also ▁Comm unes ▁of ▁the ▁Nord ▁department ▁ ▁References ▁ ▁IN SEE ▁commune ▁file ▁ ▁External ▁links ▁ ▁Official ▁web ▁site ▁ ▁Category : Comm unes ▁of ▁Nord ▁( F rench ▁department ) <0x0A> </s> ▁X Y Z ▁particles ▁are ▁recently ▁discovered ▁heavy ▁mes ons ▁whose ▁properties ▁do ▁not ▁appear ▁to ▁fit ▁the ▁standard ▁picture ▁of ▁char mon ium ▁and ▁bottom on ium ▁states . ▁They ▁are ▁therefore ▁types ▁of ▁ex otic ▁mes on . ▁The ▁term ▁ar ises ▁from ▁the ▁names ▁given ▁to ▁some ▁of ▁the