Upgradation of Iron Ore Fines and Slime by Selective Flocculation Using Surface-Active Agents, Settling Study, and Characterization of the Beneficiation Waste for Value Addition

Table 7

Important bands of clay minerals along with their possible assignments.

Band (cm^−1)	Assignments
3693	Internal surface-free OH stretch (Al2O-H).
3615	Internal O−H stretch (Al2O-H)
3189	Hydrogen-bonded O-H stretch
1635	H-O-H str.
1101, 1029	Si-O-Si, Si-O str.
1029 and 1005	Asymmetric and symmetric stretching modes of Si-O-Si
909	Al-O-H str.
801	Si-O str., Si-O-Al str.
	(Al, Mg)-O-H
	Si-O-(Mg, Al) str.
696	Si-O str., Si-O-Al str.
543	Si-O str., Si-O-Al str.
471	Si-O str., Si-O-Fe str.