Explanation

It is not a single mineral. It is a mixture of goethite, lepidogenite, hydrogoethite, hydrolepidogenite, water rich ferric hydroxide cement, aluminum hydroxide and argillaceous matter, "component Fe2C) 3." H2 (), Fe - generally 30%? 40%, with significant changes in composition, often forming dense blocks or colloidal shapes (oolitic, bell shaped, nodular, renal), earthy, and porous shapes. Most of the fine acicular crystals are goethite; most of them are small scaly but not fibrous iron ore (called red mica). Renal and stalactitic limonite surface often has a layer of bright pitch black membrane shell, which is called glass head. Colors M are yellow, brown, brownish black to reddish brown. Stripes are yellowish brown or brownish yellow. Mohs hardness 1? 4. The earthy ones have low hardness and a density of 3.3? 4g/ctn3. It is the product of supergene, mainly due to weathering, and is formed by transformation of iron bearing sulfide, oxide, carbonate and silicate; The precipitated trifoliate orange is formed by coagulation of ferric hydroxide colloidal solution of mountain sea facies and lake facies. When large M aggregates, leaves are used as mineral raw materials for ironmaking.

Classification