Pressure Induced Amorphization of Antiferromagnetic FePO_4 and Fe(OH)_2
X-ray diffraction studies were performed in b-FePO<SUB>4</SUB> and Fe (OH) <SUB>2</SUB> In FePO<SUB>4</SUB>, at P=2. 5 (5) GPa, a transformation to a coexisting new crystalline and amorphous phase is observed with about equal abundance. The crystalline phase is identified as VCrO<SUB>4</SUB>-type where Fe<SUP>III</SUP> and P<SUP>V</SUP> ions, are six-fold and four-fold coordinated, respectively. The pressure cycle is hysterectic. The onset of pressure-induced amorphization in Fe (OH) <SUB>2</SUB> is at ∼ 1 GPa however is incomplete to the highest pressure (P ∼ 24 GPa). Evidence exists that anisotropic, short-range-order is involved in the amorphization process.
- 高圧力の科学と技術 = The Review of high pressure science and technology
高圧力の科学と技術 = The Review of high pressure science and technology 7, 356-358, 1998
The Japan Society of High Pressure Science and Technology