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Category Oxide mineral
(repeating unit)
Strunz classification 4.DB.05
Dana classification
Crystal system Tetragonal
Ditetragonal dipyramidal class
Space group Tetragonal
H–M Symbol: (4/m 2/m 2/m)
Space group: P42/mnm
Unit cell a = 4.3975, c = 2.8625 [Å]; Z = 2
Formula mass 104.61
Color Grayish black, light gray in reflected light
Crystal habit Subhedral crystals, as inclusions in sphalerite
Twinning Occasionally twinned on {101}
Mohs scale hardness 6-7
Luster Vitreous - adamantine
Diaphaneity Transparent to opaque
Specific gravity 6.28 calculated
Optical properties Uniaxial (+)
Refractive index 2.01
References [1][2][3]

Argutite (GeO2) is a rare germanium oxide mineral. It is a member of the rutile group.

It was first described for an occurrence in the Argut deposit, central Pyrenees, Haute-Garonne, France in 1983.[2][3] The type locality is within a zinc ore deposit within lower Paleozoic sedimentary rocks that have undergone metamorphism. Associated minerals include sphalerite, cassiterite, siderite and briartite.[3]

See also[edit]