CIVIL SNAPS – BUILDING MATERIALS

CIVIL SNAPSBUILDING MATERIALS

Important varieties of Iron ores

Name

Percentage of Iron

Other names

Colour

Magnetite (FeSO4) 70 – 73% Black oxide of iron

Black

Haematite (Fe2O3)

65 – 70% Red oxide of iron Iron black/steel grey
Limonite (2Fe2O3.3H2O) 60% Brown Haematite

Brown, yellow, yellowish brown

Pyrites (FeS2)

45 – 47% Sulphide of Iron Pale yellow, Brass yellow
Siderite (FeCO3) 40% Carbonate of Iron

Yellow, Brownish red

CIVIL SNAPS – BUILDING MATERIALS

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CIVIL SNAPS – BUILDING MATERIALS

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