Strunz Table

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	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 V or U)
	4.G	Uranyl Hydroxides
	4.H	V[5,6] Vanadates
	4.J	Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
	4.K	Iodates: Trigonal [IO₃] pyramids (mostly).
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Nickel-Strunz Classification - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates) 10th edition