TRONA
TRONA Trona – Na3H(CO3)2.2H2O – is a relatively rare carbonate that occurs in arid regions. It is an important ore of sodium carbonate (“soda ash”) mainly in the USA, where the Green River Formation deposit is the largest known deposit of its type in the world. In the rest of the world, Na carbonate is […]
TROILITE
TROILITE Troilite is a rare sulfide, found here on Earth in only a few very specific geological occurrences. It has no economic use. Troilite is classified in the Pyrrhotite Group. It is the S analogue of achávalite (FeSe) and chemically the Fe analogue of covellite (CuS). It can transform into hexagonal pyrrhotite at T<122ºC, in […]