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Ferrimolybdite
Chemical Formula	Fe2MoO43·8H2O
Species	Molybdates & Tungstates
Crystal System	Orthorhombic
Mohs Scale	1-2
Specific Gravity	3.085
Color	Yellow, canary yellow, or sulfur yellow, greenish yellow; colourless to canary-yellow in transmitted light
Streak	Light yellow
Luster	Adamantine, Silky, Earthy
Refractive Index	n = 1.720 - 1.810 n = 1.730 - 1.830 n = 1.850 - 2.040
Diaphaneity	Transparent, Translucent
Crystal Habit：Crystals needlelike to fibrous forming crusts; tufted to radial aggregates; powdery, earthy, films, massive.
Geological Setting：Oxidztion zones of molybdenum-bearing deposits

Ferrimolybdite

Iron molybdenum, molybdenum sulfide is the oxide minerals, molybdenum is the rare metal elements, in the molybdenum minerals, the most important is the molybdenite, Mo Hua also followed by the. Iron molybdenum Hua crystal is very small, a fiber, husk, radial aggregate, or shaped like earth, powder and covered in other rocks by membrane. Color is yellow, with adamantine luster or silk luster.

Chemical composition: Fe23+ ( MoO4 ) 3.8H2O (? )

Causes of occurrence: molybdenum sulfide oxide;

Famous origin: world famous origin with Australia, Italy and Canada etc..

The origin of the name: the chemical composition of naming;

:: crystal morphology

Microscopic crystals, a fine fiber bundle, crust and radial aggregate, also shaped like earth, is film and powder;

:: crystal structure

Crystal systems and orthorhombic ( space group:? );

Powder diffraction data: 7.4 ( 1) 2.29 ( 0.6) 3.33 ( 0.5)

Physical property

Hardness: 1-2

Proportion: 4.46g/cm3

Cleavage: [001] cleavage obviously

Fracture : a fracture is not smooth

Color: yellow

Streak: pale yellow

Gloss: adamantine luster; fibrous is silky luster

:: optical properties

Two axis ( + ), Np=1.72-1.78, Nm=1.73-1.79, Ng=1.87-2.05, =0.1500-0.2700,2V ( Calc ) =26-32,2V double reflectance ( Meas ) was r<v =5-28. dispersion