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27 November, 22:40

List 3 minerals mined in Minnesota.

-What is the mineral chemical composition and classification?

-Describe 2 properties unique to the mineral.

-Where is the mine located?

-How is the mineral used?

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  1. 28 November, 01:13
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    Mineral: Iron Ore

    Chemical composition and classification: Can be found in the fom of magnetite (Fe3O4, 72.4% Fe), hematite (Fe2O3, 69.9% Fe), goethite (FeO (OH), 62.9% Fe), limonite (FeO (OH) ·n (H2O), 55% Fe) or siderite (FeCO3, 48.2% Fe).

    Properties: They can be fed directly into iron-making blast furnaces and are rich in oxides.

    Location: Silver Bay, Minnesota

    Uses: Used to make steel of various types.

    Mineral: Silica sand

    Chemical composition and classification: An oxide of silicon with the chemical formula SiO2, most commonly found in nature as quartz.

    Properties: Solid, crystallized mineral. Colorless.

    Location: Southeastern Minnesota.

    Uses: Electrical insulation in electronics, food industry, pharmaceutical industry.

    Mineral: Kaolinite

    Chemical composition and classification: Al2Si2O5 (OH) 4

    Properties: Low shrink-swell capacity and a low cation-exchange capacity.

    Location: Minnesota River Valley

    Uses: Making bricks, coating for paper manufacturing, and pottery.
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