Question: what is the difference between iron ii oxide and iron iii oxide

title: Iron(II,III) oxide
text: iron ( II , III ) oxide is the chemical compound with formula Fe O. It occurs in nature as the mineral magnetite . It is one of a number of iron oxides , the others being iron ( II ) oxide ( FeO ) , which is rare , and iron ( III ) oxide ( Fe O ) also known as hematite . It contains both Fe and Fe ions and is sometimes formulated as FeO ∙ Fe O . This iron oxide is encountered in the laboratory as a black powder . It exhibits permanent magnetism and is ferrimagnetic , but is sometimes incorrectly described as ferromagnetic . Its most extensive use is as a black pigment which is synthesised rather than being extracted from the naturally occurring mineral as the particle size and shape can be varied by the method of production . 

Answer: answer: Iron ( II ) oxide (FeO), is rare, and iron (III) oxide (Fe O) also known as hematite. This iron oxide is encountered in the laboratory as a black powder.
answer: Iron ( II ) oxide (FeO) is rare, and iron (III) oxide (Fe O) also known as hematite is encountered in the laboratory as a black powder.  Its most extensive use is as a black pigment which is synthesized as the particle size and shape can be varied by the method of production.