Winners of the Nomination Mineral of the Year (Period 2014–2021): Contribution to Mineralogical Crystallography

The principal specific features are considered for new minerals that were discovered during the period of 2014–2021 and nominated as the winners of the Mineral of the Year competition announced by the International Mineralogical Association in 2014. The corresponding publications contain the detailed description of phenomena complicating the real structure (merelanite), the uncommon combination of chemical elements (seaborgite), fragments of compounds previously known only in synthetic nonorganic phases (ophirite, chanabayaite, bojarite). The special attention is focused upon the indicative role of these minerals for reconstruction of physicochemical conditions accompanying their crystallization, as well as to their position in corresponding transformational-genetic series. A crystal growth model has been proposed of the new W-bearing mineral tewite, which has been proved experimentally.