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Köttigite

Köttigite is a rare hydrated zinc arsenate which was discovered in 1849 and named by James Dwight Dana in 1850 in honour of Otto Friedrich Köttig (1824–1892), a German chemist from Schneeberg, Saxony, who made the first chemical analysis of the mineral. It has the formula Zn3(AsO4)2·8H2O and it is a dimorph of metaköttigite, which means that the two…

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Birefringence
δ = 0.049
Category
Arsenate mineral
Cleavage
Perfect on {010}
Colour
Colourless, pink, red, red-orange or brown; light rose-pink in transmitted light
Crystal class
Prismatic (2/m) (same H-M symbol)
Crystal habit
Crystals prismatic and flattened {010}. Also in crusts with a crystalline surface and fibrous structure

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Köttigite

Nodes78
Edges77
Triples69
Avg. degree1.97
Density0.025641
Components1

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Köttigite

Top relations

related to Occurrence and associations · 29
Köttigite → As2, AsO4, At, Ca, Ca2, Co, Co2, Daniel Mine, Erzgebirge, Fe, Fe2, Germany, H2O, It, Mapimí Municipality, Mexico, Mg, Neustädtel, Ni, OH
related to Structure · 5
Köttigite → Although, C2/m, It, The, These
related to Appearance · 3
Köttigite → Crystals, It, Pure
related to Optical properties · 3
Köttigite → Biaxial, For, The
related to Physical properties · 3
Köttigite → Because, It, Mohs
Birefringence · 1
Köttigite → δ = 0.049
Category · 1
Köttigite → Arsenate mineral
Cleavage · 1
Köttigite → Perfect on {010}
Colour · 1
Köttigite → Colourless, pink, red, red-orange or brown; light rose-pink in transmitted light
Crystal class · 1
Köttigite → Prismatic (2/m) (same H-M symbol)

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Important terminology

crystals aso4 8h2o group zinc monoclinic mineral structure colourless minerals axis perpendicular two vivianite parasymplesite erythrite annabergite formula optical red

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
KöttigiteBirefringenceδ = 0.0491.00infobox
KöttigiteCategoryArsenate mineral1.00infobox
KöttigiteCleavagePerfect on {010}1.00infobox
KöttigiteColourColourless, pink, red, red-orange or brown; light rose-pink in transmitted light1.00infobox
KöttigiteCrystal classPrismatic (2/m) (same H-M symbol)1.00infobox
KöttigiteCrystal habitCrystals prismatic and flattened {010}. Also in crusts with a crystalline surface and fibrous structure1.00infobox
KöttigiteCrystal systemMonoclinic1.00infobox
KöttigiteDana classification40.3.6.51.00infobox
KöttigiteDiaphaneityTranslucent1.00infobox
KöttigiteFormula.mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:l…1.00infobox
KöttigiteFormula mass618.13 g/mol1.00infobox
KöttigiteFractureFibrous fracture yields a silky lustre1.00infobox
KöttigiteIMA symbolKöt1.00infobox
KöttigiteLustreResinous or waxy, silky on fracture1.00infobox
KöttigiteMohs scale hardness.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .de…1.00infobox
KöttigiteOptical propertiesBiaxial (+)1.00infobox
KöttigiteOther characteristicsNot fluorescent1.00infobox
KöttigitePleochroismVisible. X, Y = colourless, Z = pale red.1.00infobox
KöttigiteRefractive indexnα = 1.622 nβ = 1.638 nγ = 1.6711.00infobox
KöttigiteSolubilitySoluble in acids1.00infobox
KöttigiteSpace groupC2/m1.00infobox
KöttigiteSpecific gravity3.331.00infobox
KöttigiteStreakReddish-white to white1.00infobox
KöttigiteStrunz classification8.CE.40 (10 ed.) VII/C.13-90 (8 ed.)1.00infobox
KöttigiteTenacityFlexible1.00infobox
Köttigiteis arare hydrated zinc arsenate which was discovered in 1849 and named by James Dwight Dana in 1850 in honour of Otto Friedrich Köttig0.90text

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