| crichtonite | (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38 |
| davidite-(Ce) | (Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38 |
| davidite-(La) | (La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38 |
| davidite-(Y) | Y(Ti,Fe)21O38 |
| dessauite | (Sr,Pb)(Y,U)(Ti,Fe)20O38 |
| landauite | NaMnZn2(Ti,Fe)6Ti12O38 |
| lindsleyite | (Ba,Sr)(Ti,Cr,Fe,Mg,Zr)21O38 |
| loveringite | (Ca,Ce)(Ti,Fe,Cr,Mg)21O38 |
| mathiasite | (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 |
| senaite | Pb(Ti,Fe,Mn)21O38 |