kromiitille
Kromiitille is a term that can refer to a couple of related concepts. In mineralogy, it describes minerals that are structurally related to chromite, the primary ore of chromium. These minerals typically have a spinel crystal structure, with the general formula AB2O4, where A is a divalent cation and B is a trivalent cation. Chromite itself has the formula FeCr2O4, with iron as the A cation and chromium as the B cation. Minerals in the kromiitille group are often characterized by variations in the types of cations present, leading to different chemical formulas and properties.
Beyond mineralogy, "kromiitille" might be used in a more colloquial or less formal context to refer to