| Identification | Back Directory | [Name]
YELLOW IRON OXIDE | [CAS]
1310-14-1 | [Synonyms]
E 172
FeO(OH)
GOETHITE
EISENOXID GELB
FERRISPEC(TM) GC
IRONOXYHYDROXIDE
Einecs 215-176-6
YELLOW IRON OXIDE
Goethite (Fe(OH)O)
IRON(III) HYDROXIDE
IRON PIGMENT YELLOW
FERRIC HYDROXY OXIDE
Iron(III)oxidehydroxide
IRON(III) HYDROXIDE OXIDE
IRON OXIDE PIGMENT YELLOW
IRON(III) OXIDE, HYDRATED
IRON (III) HYDROXIDE, GAMMA
IRON (III) HYDROXIDE, ALPHA
IRON (III) ALPHA-OXYHYDROXIDE
IRON (III) GAMMA-OXYHYDROXIDE
Goethite: (Iron hydroxide oxide)
FERRISPEC(R) PL COLOR YELLOW IRON OXIDE | [EINECS(EC#)]
243-746-4 | [Molecular Formula]
FeHO2 | [MDL Number]
MFCD00064782 | [MOL File]
1310-14-1.mol | [Molecular Weight]
88.85 |
| Questions And Answer | Back Directory | [Description]
Goethite is typically formed under oxidizing conditions as a weathering product of femferous minerals, siderite, pyrite, and magnetite, and is widespread as deposits in bogs. It is commonly associated with hematite, pyrolusite, manganite, calcite, quartz, lepidocrocite, clay minerals, and limonite. Hydrous iron oxide is also called limonite. By x-ray examination, most limonites are actually cryptocrystalline goethite with absorbed or capillary water (Palache, Berman, and Frondel 1944). Several excellent pigment ore sources are found in India. Domestic ochre is mined in Georgia and Virginia. | [Physicochemical properties]
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Chemical formula
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αFeOOH.xH20
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Chemical composition of ore
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50% to 88% Fe203, 9% to 10% H20, balance silicate or clay minerals
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Crystal class
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Orthorhombic; dipyramidal
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Habit
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Prismatic and striated; also in tablets or scales, grading into acicular and long prismatic forms; also earthy
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Physical
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Cleavage [010] perfect, [100] less so, fracture uneven, hardness of 5.0-5.5
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Reaction mechanisms
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Will form ferrites through solid-state reactions as noted under
hemotite. Can also be converted from αFeOOH.xH20 to αFesO3 by heat and
to ferromagnetic γfe2O3 by reduction and oxidation.
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Melting point
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Decomposes; naturals (finely ground) start to dehydroxylate at 190°C and
is essentially dehydroxylated at 320°C; synthetics start at 180°C and
are completely dehydroxylated at 300°C
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Boiling point
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Decomposes
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Solubility
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Considered insoluble in water and common organic solvents, 0.0015 gpl cold water
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Index of refraction
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2.26-2.27
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Specific gravity
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3.3-4.0
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Magnetic
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Antiferromagnetic
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| Company Name: |
Dhirajlal And Co
|
| Tel: |
+91-2223720849 +91-2223728296 |
| Website: |
www.dhirajlal.com |
|