rockbridgeite
/ˈrɒkbrɪdʒʌɪt/Mineralogy
noun
An iron-containing mineral which occurs as dark green or black masses and crusts (turning brown in air owing to oxidation) in deposits of limonite and pegmatite.
- Rockbridgeite is a hydroxide and phosphate of iron (usually also with manganese), (Fe2+,Mn)Fe4 3+(PO4)3(OH)5. Crystal system: orthorhombic..
Origin
1940s. From the name of Rockbridge County, Virginia, location of the first specimens to be recognized + -ite.