roemerite

roemerite

[′rām·ə‚rīt]
(mineralogy)
FeFe2(SO4)4·14H2O A rust-brown to yellow mineral composed of hydrous ferric and ferrous iron sulfate.
References in periodicals archive ?
1-mm lemon-yellow flakey crystals associated with other sulfates including halotrichite, melanterite, roemerite and voltaire.
It is associated with pyrite, millerite and sulfates including roemerite.