Etude diffractométrique de chlorures doubles du type β-K₂SO₄

Crystals of A₂ZnCl₄ or A₂CoCl₄, with A = K, NH₄ or Rb, belong to the orthorhombic system. Lattice parameters, indices and spacings are tabulated for the whole series. All these crystals are isotypic with β-K₂SO₄.