@misc{MuellerSchwarzSchmidtetal., author = {M{\"u}ller, Carola J. and Schwarz, Ulrich and Schmidt, Peer and Schnelle, Walter and Doert, Thomas}, title = {High-Pressure Synthesis, Crystal Structure, and Properties of GdS2 with Thermodynamic Investigations in the Phase Diagram Gd-S,}, series = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, volume = {636}, journal = {Zeitschrift f{\"u}r anorganische und allgemeine Chemie}, number = {6}, issn = {1521-3749}, doi = {10.1002/zaac.201000015}, pages = {947 -- 953}, abstract = {Gadolinium disulfide was prepared by high-pressure synthesis at 8 GPa and 1173 K. It crystallizes in the monoclinic space group P121/a1 (No. 14) with lattice parameters a = 7.879(1) {\AA}; b = 3.936(1) {\AA}, c = 7.926(1) {\AA} and β = 90.08(1)°. The crystal structure is a twofold superstructure of the aristotype ZrSSi and consists of puckered cationic [GdS]+ double slabs that are sandwiched by planar sulfur sheets containing S22- dumbbells. The thermal decomposition of GdS2 proceeds via the sulfur-deficient polysulfides GdS1.9, GdS1.85 and GdS1.77 and eventually results in the sesquisulfide Gd2S3. GdS2 is a paramagnetic semiconductor which orders antiferromagnetically at TN = 7.7(1) K. A metamagnetic transition is observed in the magnetically ordered state.}, language = {en} }