Question

Distinguish between magnetite and hematitee

Answer 1

The key difference between magnetite and hematite is that the iron in magnetite is in +2 and +3 oxidation states whereas, in hematite, it is only in +3 oxidation state.

Magnetite and hematite are minerals of iron. Both have iron in different oxidation states, and they are in the forms of iron oxides. Another important difference between magnetite and hematite is that the magnetite is black in colour, but hematite has a variety of colours.

Magnetite is an iron oxide with the chemical formula Fe3O4 whereas hematite is an iron oxide with the chemical formula Fe2O3. Magnetite iron is in +2 and +3 oxidation states whereas, in hematite, it is only in +3 oxidation state. This is the key difference between magnetite and hematite. Moreover, magnetite has higher iron content than hematite; therefore, its quality is higher.

Apart from that, in colours too, there is a difference between magnetite and hematite. Magnetite is black in colour, but hematite has a variety of colours. However, magnetite has a black streak, whereas hematite has a reddish brown streak. As another difference between magnetite and hematite, hematite is a component of rust, but magnetite is not. Moreover, when considering the magnetic properties of the two minerals, magnetite is a naturally strong magnet, but in hematite, magnetism occurs upon heating. In addition to that, one other difference between magnetite and hematite is their structure. Hematite has a rhombododecahedral crystal structure while, magnetite commonly shows octahedral crystal structure.




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Answer 2

Magnetite :-
1. It's molecular formula is Fe3O4.
2. It is back in colour.
3. It's hardness is 5.5-6.5.
4. It has an octahedral crystal structure.
5. It occurs naturally as a strong magnet.
6. It occurs in +2 and +3 oxidation states

Hematite:-
1.It's molecular formula is Fe2O3.
2. It can be in variety of colors such as red.
3. It's hardness id 5-6.
4. It has rombododecahedral crystal structure.
5. It behaves as magnet only upon heating.
6. It occurs in +3 oxidation state.