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Rhodonite

Rhodonite is a manganese inosilicate, with the formula (Mn, Fe, Mg, Ca)SiO3, and member of the pyroxenoid group of minerals, crystallizing in the triclinic system. The term rhodonite was first introduced by Germar. from Ancient Greek ῥόδον (rhódon) 'rose'. It commonly occurs as cleavable to compact masses with a rose-red color often tending to brown due…

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2V angle
58° to 73° (measured), 58° (calculated)
Alters to
Exterior commonly black from manganese oxides
Birefringence
δ = 0.013
Category
Inosilicate minerals (single chain)
Cleavage
Perfect on {110} and {110}, (110) ^ (110) = 92.5°; good on {001}
Color
Pink, rose-pink to brownish red, red, gray and yellow

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Rhodonite

Nodes36
Edges35
Triples33
Avg. degree1.94
Density0.055556
Components1

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Rhodonite

Top relations

related to References · 5
Rhodonite → Cambridge University Press, Chisholm, Encyclopædia Britannica, Hugh, This
is a · 2
Rhodonite → manganese inosilicate, official gemstone of the Commonwealth of Massachusetts
2V angle · 1
Rhodonite → 58° to 73° (measured), 58° (calculated)
Alters to · 1
Rhodonite → Exterior commonly black from manganese oxides
Birefringence · 1
Rhodonite → δ = 0.013
Category · 1
Rhodonite → Inosilicate minerals (single chain)
Cleavage · 1
Rhodonite → Perfect on {110} and {110}, (110) ^ (110) = 92.5°; good on {001}
Color · 1
Rhodonite → Pink, rose-pink to brownish red, red, gray and yellow
Crystal class · 1
Rhodonite → Pinacoidal (1) (same H–M symbol)
Crystal habit · 1
Rhodonite → Tabular crystals, massive, granular

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Important terminology

manganese crystals cleavage inosilicate occurs often material unit iron zinc tetrahedra triclinic masses rose-red rare variety fowlerite repeat ornamental stone

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Rhodonite2V angle58° to 73° (measured), 58° (calculated)1.00infobox
RhodoniteAlters toExterior commonly black from manganese oxides1.00infobox
RhodoniteBirefringenceδ = 0.0131.00infobox
RhodoniteCategoryInosilicate minerals (single chain)1.00infobox
RhodoniteCleavagePerfect on {110} and {110}, (110) ^ (110) = 92.5°; good on {001}1.00infobox
RhodoniteColorPink, rose-pink to brownish red, red, gray and yellow1.00infobox
RhodoniteCrystal classPinacoidal (1) (same H–M symbol)1.00infobox
RhodoniteCrystal habitTabular crystals, massive, granular1.00infobox
RhodoniteCrystal systemTriclinic1.00infobox
RhodoniteDana classification65.04.01.011.00infobox
RhodoniteDiaphaneityTransparent to translucent1.00infobox
RhodoniteFormula(Mn2+, Fe2+, Mg, Ca)SiO31.00infobox
RhodoniteFractureConchoidal to uneven1.00infobox
RhodoniteGroupPyroxene group1.00infobox
RhodoniteIMA symbolRdn1.00infobox
RhodoniteLusterVitreous to pearly1.00infobox
RhodoniteMohs scale hardness5.5–6.51.00infobox
RhodoniteOptical propertiesBiaxial (+)1.00infobox
RhodonitePleochroismWeak1.00infobox
RhodoniteRefractive indexnα = 1.711–1.738, nβ = 1.714–1.741, nγ = 1.724–1.7511.00infobox
RhodoniteSpace groupP11.00infobox
RhodoniteSpecific gravity3.57–3.761.00infobox
RhodoniteStreakWhite1.00infobox
RhodoniteStrunz classification9.DK.051.00infobox
RhodoniteTwinningLamellar, composition plane {010}1.00infobox
RhodoniteUnit cella = 9.758 Å, b = 10.499 Å, c = 12.205 Å; α = 108.58°, β = 102.92°, γ = 82.52°; Z = 201.00infobox
Rhodoniteis amanganese inosilicate0.90text
Rhodoniteis aofficial gemstone of the Commonwealth of Massachusetts0.90text

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