"' Campylite "'is a variety of the lead arsenate mineral mimetite which received the name from the Greek'kampylos'- bent, on account of the barrel-shaped bend of its crystals.
12.
"' Mimetite "', whose name derives from the Greek ??????? " mimetes ", meaning " imitator ", is a lead arsenate chloride mineral ( Pb 5 ( AsO 4 ) 3 Cl ) which forms as a secondary mineral in lead deposits, usually by the Pb 5 ( 4 ) 3 ).
