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Ankerite

Ankerite, also known as brown spar: 258 (German: braunspat) or bitter spar is a calcium, iron, magnesium, manganese carbonate mineral of the group of rhombohedral carbonates with the chemical formula Ca(Fe,Mg,Mn)(CO3)2. In composition it is closely related to dolomite, but differs from this in having magnesium replaced by varying amounts of iron(II) and…

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Birefringence
δ = 0.180–0.202
Category
Carbonate mineral
Cleavage
Perfect on {1011}
Color
Brown, yellow, white
Crystal class
Rhombohedral (3) H–M symbol: (3)
Crystal habit
Chrystals rhombohedral with curved faces; columnar, stalactitic, granular, massive

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Overview

Name and history

Properties

Genesis

Image gallery

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Map overview Semantic statistics

Ankerite

Nodes31
Edges30
Triples39
Avg. degree1.94
Density0.064516
Components1

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Ankerite

Top relations

related to history · 8
Ankerite → Austrian, Haidinger, In, It, Matthias Joseph Anker, Styria, This, Wilhelm
related to Genesis · 5
Ankerite → Dundas, In, It, Tasmania, Western Tasmania
related to Image gallery · 3
Ankerite → King County, Peru, WashingtonAnkerite
Birefringence · 1
Ankerite → δ = 0.180–0.202
Category · 1
Ankerite → Carbonate mineral
Cleavage · 1
Ankerite → Perfect on {1011}
Color · 1
Ankerite → Brown, yellow, white
Crystal class · 1
Ankerite → Rhombohedral (3) H–M symbol: (3)
Crystal habit · 1
Ankerite → Chrystals rhombohedral with curved faces; columnar, stalactitic, granular, massive
Crystal system · 1
Ankerite → Trigonal

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Important terminology

dolomite iron brown also series magnesium manganese mineral rhombohedral spar white name carbonate group formula ca fe mg mn co3

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
AnkeriteBirefringenceδ = 0.180–0.2021.00infobox
AnkeriteCategoryCarbonate mineral1.00infobox
AnkeriteCleavagePerfect on {1011}1.00infobox
AnkeriteColorBrown, yellow, white1.00infobox
AnkeriteCrystal classRhombohedral (3) H–M symbol: (3)1.00infobox
AnkeriteCrystal habitChrystals rhombohedral with curved faces; columnar, stalactitic, granular, massive1.00infobox
AnkeriteCrystal systemTrigonal1.00infobox
AnkeriteDiaphaneityTranslucent to transparent1.00infobox
AnkeriteDispersionStrong1.00infobox
AnkeriteFormula.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
AnkeriteFractureSubconchoidal1.00infobox
AnkeriteIMA symbolAnk1.00infobox
AnkeriteLusterVitreous to pearly1.00infobox
AnkeriteMohs scale hardness3.5–4.01.00infobox
AnkeriteOptical propertiesUniaxial (−)1.00infobox
AnkeriteRefractive indexnω = 1.690–1.750 nε = 1.510–1.5481.00infobox
AnkeriteSpace groupR31.00infobox
AnkeriteSpecific gravity2.93–3.101.00infobox
AnkeriteStreakWhite1.00infobox
AnkeriteStrunz classification5.AB.101.00infobox
AnkeriteTenacityBrittle1.00infobox
AnkeriteTwinningSimple t {0001}, {1010}. {1120}1.00infobox
AnkeriteUnit cella = 4.8312(2) c = 16.1663(3) [Å]; Z = 31.00infobox

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