Mg-Na, Structural properties, Trigonal

• Al-B-Ca-Fe-H-K-Mg-Na-O-Si
• Al-B-Ca-Fe-H-Mg-Na-O-Si-Ti
• Al-B-Ca-F-Fe-H-Mg-Na-O-Si
• Al-B-Cr-F-H-Mg-Na-O-Si-V
• Al-B-F-Fe-H-Mg-Na-O-Si-Ti
• alkaline
• alkali
• chalcogen
• disordered