Demir Minerallerinden Manyetit
Manyetit: Sertliği 5.5 mohs ve yoğunluğu 4.9-5.2 g/cm³, demir siyahı renkte, manyetik özelliğe sahip olup elektrik iletkenliği çok yüksektir. Kendine özgü demir siyahı rengi kolaylıkla…
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