Wiktionary
hollandite
n. (context mineral English) A monoclinic-prismatic white mineral containing aluminum, barium, iron, lead, manganese, oxygen, silicon, and sodium.
Wikipedia
Hollandite
Hollandite is an oxide mineral. It was discovered in the Kajlidongri Mine Jhabua district, Madhya Pradesh. It was described by Lewis Leigh Fermor and named after Thomas Henry Holland , the director of the Geological Survey of India.