ˈzərkləˌrīt noun
( -s )
Etymology: German zirklerit, from Zirkler, 20th century German director of mines + German -it -ite
: a mineral (Fe,Mg,Ca) 9 Al 4 Cl 18 (OH) 12 .14H 2 O consisting of a basic hydrous chloride of iron, magnesium, calcium, and aluminum