. "b_1, b_2, b_3" . . "http://en.wikipedia.org/wiki/Reciprocal_lattice"^^ . . . . "\"Fundamental Reciprocal Lattice Vector\" are fundamental, or primary, translation vectors the reciprocal lattice." . . . . . . "http://www.iso.org/iso/catalogue_detail?csnumber=31897"^^ . "Fundamental Reciprocal Lattice Vector"@en .