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Lepidocrocite

Lepidocrocite (γ-FeO(OH)), also called esmeraldite or hydrohematite, is an iron oxide-hydroxide mineral. Lepidocrocite has an orthorhombic crystal structure, a hardness of 5, specific gravity of 4, a submetallic luster and a yellow-brown streak. It is red to reddish brown and forms when iron-containing substances rust underwater. Lepidocrocite is…

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2V angle
Measured: 83°
Birefringence
δ = 0.570
Category
Oxide minerals
Cleavage
{010} Perfect
Color
Ruby-red to reddish brown; light reddish to red-orange in transmitted light; gray-white in reflected light
Crystal class
Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)

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Lepidocrocite

Nodes25
Edges24
Triples25
Avg. degree1.92
Density0.08
Components1

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Lepidocrocite

Top relations

related to References · 3
Lepidocrocite → Boehmite Structure, March, Steven Dutch
2V angle · 1
Lepidocrocite → Measured: 83°
Birefringence · 1
Lepidocrocite → δ = 0.570
Category · 1
Lepidocrocite → Oxide minerals
Cleavage · 1
Lepidocrocite → {010} Perfect
Color · 1
Lepidocrocite → Ruby-red to reddish brown; light reddish to red-orange in transmitted light; gray-white in reflected light
Crystal class · 1
Lepidocrocite → Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Crystal habit · 1
Lepidocrocite → Flattened scales aggregated into plumose groups and rosettes; massive, bladed to fibrous or micaceous
Crystal system · 1
Lepidocrocite → Orthorhombic
Diaphaneity · 1
Lepidocrocite → Transparent

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Important terminology

iron scale structure mineral rust ore orthorhombic found bonded hardness luster γ-feo oh crystal specific gravity streak reddish brown minerals

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Lepidocrocite2V angleMeasured: 83°1.00infobox
LepidocrociteBirefringenceδ = 0.5701.00infobox
LepidocrociteCategoryOxide minerals1.00infobox
LepidocrociteCleavage{010} Perfect1.00infobox
LepidocrociteColorRuby-red to reddish brown; light reddish to red-orange in transmitted light; gray-white in reflected light1.00infobox
LepidocrociteCrystal classDipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)1.00infobox
LepidocrociteCrystal habitFlattened scales aggregated into plumose groups and rosettes; massive, bladed to fibrous or micaceous1.00infobox
LepidocrociteCrystal systemOrthorhombic1.00infobox
LepidocrociteDiaphaneityTransparent1.00infobox
LepidocrociteFormulaγ-FeO(OH)1.00infobox
LepidocrociteFormula mass88.85 g/mol1.00infobox
LepidocrociteIMA symbolLpc1.00infobox
LepidocrociteLustersub metallic1.00infobox
LepidocrociteMohs scale hardness51.00infobox
LepidocrociteOptical propertiesBiaxial (−)1.00infobox
LepidocrocitePleochroismStrong; X = colorless to yellow; Y = orange, yellow, dark red-orange; Z = orange, yellow, darker red-orange1.00infobox
LepidocrociteRefractive indexnα = 1.940 nβ = 2.200 nγ = 2.5101.00infobox
LepidocrociteSpace groupCmcm1.00infobox
LepidocrociteSpecific gravity41.00infobox
LepidocrociteStreakDull orange1.00infobox
LepidocrociteStrunz classification4.FE.151.00infobox
LepidocrociteUnit cella = 3.88, b = 12.54 c = 3.07 [Å]; Z = 41.00infobox

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