Table 2.

Major and minor mineral phases of Pb identified in metal-rich particles in urban dust samples collected in the Pb-polluted urban environment area from Torreón (northern Mexico). Mineral phases are alphabetically ordered.

Pb phase	Formulation	Selected weathered Pb-rich particles
		S 1.2	SE < 1	E 2.5	W < 3	W < 1	SW < 2	NNE < 1	NW 3	NE 2	NW 0.5	SW 1.1
Major minerals
Anglesite	PbSO4		+	+				+	+	+?	+	+
Cerussite	PbCO3		+	+	+	+	+	+			+	+
Galena	PbS	+	+	+		+	+	+		+	+	+?
Hydrocerussite	Pb3(CO3)2(OH)2	−	+	+?	+	+	+	+			+?	+?
Hydroxylpyromorphite	Pb5(PO4)3(OH)	+	+?	+?	+							+?
Litharge	PbO		+			+						+
Minor minerals
Caledonite	Pb5Cu2(SO4)3(CO3)(OH)6	+	+	+	+			+			+	+
Crimsonite	PbFe2(PO4)2(OH)2		+	+				+				+
Esperite	PbCa2Zn3(SiO4)3	+	+?	+?	+	+						+
Feinglosite	Pb2Zn(AsO4)2	+	+	+								+
Friedrichite	Pb5Cu5Bi7S18					+	+		+			+?
Galenobismutite	PbBi2S4					+	+		+
Lautenthalite	PbCu4(SO4)2(OH)6	+	+	+	+						+	+
Linarite	PbCu(SO4)(OH)2	+	+	+	+						+
Luddenite	Cu2Pb2Si5O14		+					+			+
Massicot	PbO		+?			+?						+?
Vanackerite	Pb4Cd(AsO4)3(Cl,OH)	+	+		+							+

+ = present, +? = seems present, empty = non-observed.