@article{oai:nitech.repo.nii.ac.jp:00004473,
 author = {Kitahara, Hiromi and Ishizawa, Nobuo and Marumo, Fumiyuki and Noda, Yasutoshi},
 issue = {5},
 journal = {PHYSICAL REVIEW B},
 month = {Feb},
 note = {Single-crystal x-ray diffraction study under high pressure has been carried out on AgGaS2 to obtain crystallographic information on the stable phase in the pressure range between 4.2 and 11.6 GPa. The high-pressure phase has monoclinic symmetry with space group Cc, a=8.065(4) A, b=8.039(1) A, c=6.226(3) A, and β=128.50(3)° at 5.6 GPa. The monoclinic cell can be approximated as a pseudotetragonal cell of apt=bpt,=5.694 A, cpt=9.750 A, αpt=βpt=88.70°, and γpt=89.82° on the basis of the conventional chalcopyrite-type unit cell. The high-pressure phase is assumed to have a distorted chalcopyrite-type structure. The phase transition is reversible. A transformation twinning was observed in the high-pressure phase. The four possible twin components are related by the twofold axes present in the symmetry of the ambient-pressure phase., application/pdf},
 pages = {2690--2672},
 title = {Monoclinic high-pressure phase of AgGaS2},
 volume = {55},
 year = {1997}
}