Assertion: siderite | /r/HasProperty | r-centered trigonal feco 3
Facets:
Source sentences:
text: Four main structural phases, belonging to quartz (hexagonal SiO 2 ), siderite (R-centered trigonal FeCO 3 ), calcite (trigonal CaCO 3 ), and magnetite (tetragonal Fe 3 O 4 ) can be clearly identified in the diffraction patterns of the host rock at 221.88 m (Fig. 4a) and at 223.435 m (Fig. 4b).