Table 1.

The major chemical compositions (oxide wt.%), loss on ignition (LOI, wt.%) and Al/Si in bauxite over the world.

Bauxite Origin	Al2O3	Fe2O3	SiO2	TiO2	MgO	K2O	CaO	Na2O	LOI	Al/Si	Ref.
Juruti, Brazil	45.0	14.7	24.9	1.9	-	-	-	-	18.2	1.8	[19]
Mandan, Iran	44.4–64.1	2.8–22.3	3.3–9.6	2.1–3.2	0.1–0.3	0.02–0.3	0.05–11.3	0.02–0.07	11.1–23.2	5.4–15.8	[20]
Kanisheeteh, Iran	20.2–33.4	17.2–34.2	23.6–43.6	3.1–4.8	0.01–0.7	0.02–1.3	0.1–0.4	0.01–0.9	6.0–9.7	0.5–1.4	[21]
Rompin, Malaysia	29.0–44.4	2.5–4.0	28.8–52.5	0.2–0.3	>0.01	0.05–0.1	-	-	13.9–24.1	0.55–1.54	[22]
Kuantan, Malaysia	41.3–43.6	20.7–23.5	3.1–11.9	3.5–4.1	0.08–0.09	-	-	-	22.0–25.2	3.5–14.0	[22]
Johor, Malaysia	43.4–50.6	15.1–17.3	3.7–13.8	2.4–2.3	-	-	-	-	22.8–28.0	3.1–13.7	[22]
Guangxi, China	52.3–62.4	16.6–24.5	3.5–8.3	1.9–3.2	0.02–0.09	0.004–0.03	0.03–0.1	0.001–0.2	11.8–17.7	6.3–17.7	[14]
Henan, China	63.3–69.4	1.5–9.4	8.7–18.0	0.7–3.2	-	-	-	-	12.8–14.7	3.4–7.6	[15]
Shandong, China	37.4	8.7	32.2	2.3	0.9		3.2	0.9	13.7	1.2	[16]
Guangxi, China	58-6	15.0–17.0	5.0–6.0	-	-	-	-	-	-	9.9	[17]
Guizhou, China	67.0–68.0	2.2–3.0	8.8–11.1	-	-	-	-	-	-	6.1–7.8	[17]
Henan, China	64.0–74.0	3.0–5.1	7.5–13.7	-	-	-	-	-	-	4.7–9.4	[17]
Shandong, China	54.0–61.0	5.0–9.0	15.0–22.0	-	-	-	-	-	-	3.7–3.9	[17]
Shanxi, China	63.0–65.0	2.0–3.0	11.0–13.0	-	-	-	-	-	-	5.0–5.6	[17]
Henan, China	66.8	1.4	12.5	3.0	0.1	0.3	0.3	0.04	14.2	5.4	[18]
France	58.6	26.2	0.8	2.8	-	-	-	-	-	73.3	[23]
France	76.4	4.8	0.8	3.3	-	-	-	-	-	95.5	[23]
France	60.6	26	0.3	0.8	-	-	-	-	-	209.0	[23]
France	63.7	5.5	13.3	2.4	-	-	-	-	-	4.8	[23]
Romania	59.7	23.7	1.5	3.1	-	-	-	-	-	2.5	[23]
Romania	65.5	21.3	0.8	2.8	-	-	-	-	-	82	[23]
Italy	57.6	26.6	2.8	1.3	-	-	-	-	-	20.7	[23]
Italy	58.9	18.6	7.9	-	-	-	-	-	-	7.4	[23]
Alabama, USA	58.2	3.6	2.9	3.4	-	-	-	-	-	20.1	[23]
Arkansas, USA	62.3	1.7	2.0	3.5	-	-	-	-	-	31.1	[23]
Arkansas, USA	55.1	6.1	10.1	-	-	-	-	-	-	5.4	[23]
Georgia, USA	64.9	0.3	0.6	1.1	-	-	-	-	-	104.7	[23]
Guyana, UK	64.4	0.5	2.7	0.1	-	-	-	-	-	23.6	[23]
Guyana, UK	70.9	0.8	1	1.1	-	-	-	-	-	70.9	[23]