| Kaemmererite | Cr3+ | Andrut et al. (1996) |
| Kanonaite | Mn3+ | Smith et al. (1982) |
| Abs-Wurmbach et al. (1981) | ||
| Knebellite | Burns (1970a) | |
| Kornerupine | V3+ | Schmetzer (1982) |
| Fe,V3+ | Schmetzer et al. (1974) | |
| Kosmochlor | Cr3+ | Langer (1988) |
| Abs-Wurmbach et al. (1985) | ||
| Khomenko and Platonov (1985) | ||
| Kyanite | Fe, Ti | Ghera et al. (1986) |
| Smith and Strens (1976) | ||
| Faye and Nickel (1969) | ||
| White and White (1967) | ||
| Fe3+ | White and White (1967) | |
| Cr3+ | Platinov et al. (1998) | |
| Langer et al. (1997) | ||
| Czaja et al. (1995) | ||
| Platinov et al. (1993) | ||
| Rossman (1988) | ||
| Langer (1988) | ||
| Platinov et al. (1985) | ||
| Bosshart et al (1982) | ||
| Bakhtin (1978) | ||
| Langer and Abu-Eid (1977) | ||
| Platonov (1976) | ||