Category:Strunz class 04

OXIDES (Hydroxides, 5- and 6-coordinate vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)

• 4.A: Metal:Oxygen = 2:1 and 1:1
• 4.B: Metal:Oxygen = 3:4 and similar
• 4.C: Metal:Oxygen = 2:3, 3:5, and similar
• 4.D: Metal:Oxygen = 1:2 and similar
• 4.E: Metal:Oxygen = < 1:2
• 4.F: Hydroxides (without vanadium or uranium)
• 4.G: Uranyl hydroxides
• 4.H: Five- and six-coordinate vanadates
• 4.J: Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
• 4.K: Iodates with trigonal pyramidal IO_{3>/sub> units}