Mumme, W.
, Grey, I.
, Roth, R.
and Vanderah, T.
(2007),
Contrasting oxide crystal chemistry of Nb and Ta. The structures of the hexagonal bronzes BaTa2O6 and Ba0.93Nb2.03O6, Journal of Solid State Chemistry, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=854383
(Accessed December 13, 2024)