Nioboholtite is an extremely rare mineral with the formula (Nb0.6[]0.4)Al6BSi3O18. It is the niobium-rich member of the dumortierite supergroup, and the niobium analogue of holtite of the holtite group. It is one of three quite recently found minerals of this group, the other two being titanoholtite and szklaryite, all coming from the Szklary village near Ząbkowice Śląskie in Poland. They occur in a unique pegmatite.[2] Nioboholtite and schiavinatoite are both minerals with essential niobium and boron.[4]
^ abPieczka, A.; Evans, R. J.; Grew, E. S.; Groat, L. A.; Ma, C.; Rossman, G. R. (2013). "The dumortierite supergroup. II. Three new minerals from the Szklary pegmatite, SW Poland: Nioboholtite, (Nb0.6〈0.4)Al6BSi3O18, titanoholtite, (Ti0.75〈0.25)Al6BSi3O18, and szklaryite, 〈Al6BAs3+3O15" (PDF). Mineralogical Magazine. 77 (6): 2841. Bibcode:2013MinM...77.2841P. doi:10.1180/minmag.2013.077.6.10. S2CID 51740732.
^"Nioboholtite: Nioboholtite mineral information and data". Mindat.org. Retrieved 2016-03-03.
^"Schiavinatoite: Schiavinatoite mineral information and data". Mindat.org. Retrieved 2016-03-10.
Nioboholtite is an extremely rare mineral with the formula (Nb0.6[]0.4)Al6BSi3O18. It is the niobium-rich member of the dumortierite supergroup, and the...
three quite recently found minerals of this group, the other two being nioboholtite and szklaryite, all coming from the Szklary village near Ząbkowice Śląskie...
three quite recently found minerals of this group, the other two being nioboholtite and titanoholtite, all coming from the Szklary village near Ząbkowice...
(tetragonal, space group I41/amd) and occur in pegmatites. Schiavinatoite and nioboholtite are minerals with essential niobium and boron. Schiavinatoite was detected...