(beta-4)-tungstate(wo42-magnesium(1:1) ;MgWO4;Tungstate (WO4<sup>2-</sup>), magnesium (1:1), (T-4)-;Tungstate (WO42-), magnesium (1:1), (T-4)-;MAGNESIUM TUNGSTATE;MAGNESIUM TUNGSTEN OXIDE;magnesium wolframate, not of a kind used as a luminophore;magnesium wolframate, of a kind used as a luminophore