ˈhōldəˌnīt noun
( -s )
Etymology: Albert F. Holden died 1913 American mining engineer + English -ite
: a mineral (Mn,Ca) 4 (Zn,Mg,Fe) 2 (AsO 4 )(OH) 5 O 2 consisting of a basic manganese zinc arsenate with minor calcium, magnesium, and iron and occurring as red orthorhombic crystals at Franklin, New Jersey