'Labuntsovite Supergroup' (not an IMA approved species)
Comments:
Furnes et al. 1982) describes a "labuntsovite" from Dalsfjorden. An analysis of the material shows in wt% MgO 0.73%, MnO 0.24% and FeO 2.41% and relative little Na (1.21%) and K (4.27%).