(Mg0.9Fe0.1)9[SiO4]4([OH]0.5F0.5)2 mP62 14

• Fe-H-Mg-O-Si-Ti
• F-H-Mg-O-Si
• F-H-Mg-O-Si-Ti
• F-Fe-H-Mg-O-Si
• H-Mg-O-Si
• structural properties
• refractive index
• values of refractive index
• optical properties
• Mohs hardness
• metalloid
• alkaline
• chalcogen
• hydroxide
• orthosilicate
• monoclinic