Neue Oxoborate der Alkalimetalle: NaLi2[BO3] [1]

New Borates of the Alkali Metals: NaLi₂[BO₃] The hitherto unknown NaLi₂[BO]₃ is prepared in the shape of monoclinic, colourless-transparent and prismatic single crystals [a = 950.7(4) pm, b = 1 203.7(4) pm, c = 493.0(3) pm, β = 104.0(10)°, d_x = 2.32 g/cm³, d_pyk = 2.28 g/cm³]. The crystal structure has been solved by four-circle-diffractometer [PW 1100, MoK, R = 7.52%, R_w = 4.66%]. Effective Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, are calculated.