Hedenbergite Mineral Data

Hedenbergite Mineral Data +

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General Hedenbergite Information

Chemical Formula:

CaFe++Si2O6

Composition:

Molecular Weight = 248.09 gm

Calcium 16.15 % Ca 22.60 % CaO

Iron 22.51 % Fe 28.96 % FeO

Silicon 22.64 % Si 48.44 % SiO₂

Oxygen 38.69 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaFe²⁺Si₂O₆

Environment:

Contact metasomatic rocks.

IMA Status:

Valid Species (Pre-IMA) 1819

Locality:

Nordmark, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named after the Swedish mineralogist, M. A. L. Hedenberg.

Synonym:

ICSD 10226

PDF 41-1372

Hedenbergite Image

Images:

Hedenbergite

Comments: Thick, bluish gray blocky prisms of hedenbergite on matrix.
Location: Harstig mine, Pajsberg, Varmland, Sweden. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Hedenbergite Ilvaite

Comments: Doubly terminated, black ilvaite on crystals of greenish gray hedenbergite with minor galena.
Location: First Sovietsky mine, Dalnjegorsk, Russia. Scale: 4 x 2.8 x 1.8 cm.
© Fabre Minerals

Hedenbergite Crystallography

Axial Ratios:

a:b:c =1.0926:1:0.5849

Cell Dimensions:

a = 9.827, b = 8.994, c = 5.261, Z = 4; beta = 105.52° V = 448.03 Den(Calc)= 3.68

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.97(1), 2.53(0.5), 2.56(0.3),

Crystal Structure:

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Cameron M , Sueno S , Prewitt C T , Papike J J , American Mineralogist , 58 (1973) p.594-618, High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite,, spodumene, and ureyite, T = 24 C, pyroxene

View Additional jPOWD Structure files for Hedenbergite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [3] [4] [5] [6] [7] [8] [9]

Physical Properties of Hedenbergite

Cleavage:

[???] Perfect, [???] Indistinct

Color:

Brownish green, Gray green, Grayish black, Dark green, Black.

Density:

3.55

Diaphaniety:

Transparent to translucent to opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Lamellar - Thin laminae producing a lamellar structure.

Hardness:

5-6 - Between Apatite and Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Streak:

white green

Optical Properties of Hedenbergite

Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1981,KPDmeas= 0.2053,KC= 0.2027

Optical Data:

Biaxial (+), a=1.699-1.739, b=1.705-1.745, g=1.728-1.757, bire=0.0180-0.0290, 2V(Calc)=56-72, 2V(Meas)=58-63. Dispersion distinct to strong, r > v.

Pleochroism (x):

purplish green, pale bluish green, dark bluish green, or deep green.

Pleochroism (y):

pinkish purple, pale green, or bluish green.

Pleochroism (z):

pale yellowish green, yellow, or brownish yellow.

Calculated Properties of Hedenbergite

Electron Density:

r_electron=3.49 gm/cc
note: r_Hedenbergite=3.55 gm/cc.

Fermion Index

Fermion Index = 0.01574
Boson Index = 0.98426

Photoelectric:

PE_Hedenbergite= 9.53 barns/electron
U=PE_Hedenbergite x r_electron= 33.29 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hedenbergite is Not Radioactive

Hedenbergite Classification

Dana Class:

65.1.3a.2 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.1)with chains P=2

(65.1.3a)C2/c clinopyroxenes (Ca clinopyroxenes)

65.1.3a.1 Diopside CaMgSi2O6 C 2/c 2/m

65.1.3a.2 Hedenbergite CaFeSi2O6 C 2/c 2/m

65.1.3a.3 Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 C 2/c 2/m

65.1.3a.4 Johannsenite CaMnSi2O6 C 2/c 2/m

65.1.3a.5 Petedunnite Ca(Zn,Mn,Fe,Mg)Si2O6 C 2/c 2/m

65.1.3a.6 Esseneite CaFeAlSiO6 C 2/c 2/m

Strunz Class:

VIII/F.01-60 VIII - Silicates

VIII/F - Inosilicates (chain and band) double chains [Si2O6]4-

VIII/F.01 - Pyroxene group, Clinopyroxene

VIII/F.01-10 Clinoenstatite Mg2Si2O6 P 2₁/c 2/m

VIII/F.01-20 Clinoferrosilite (Fe,Mg)2Si2O6 P 2₁/c 2/m

VIII/F.01-30 Kanoite (Mn,Mg)2Si2O6 P 2₁/c 2/m

VIII/F.01-40 Pigeonite (Mg,Fe,Ca)(Mg,Fe)Si2O6 P 2₁/c 2/m

VIII/F.01-50 Diopside CaMgSi2O6 C 2/c 2/m

VIII/F.01-60 Hedenbergite CaFeSi2O6 C 2/c 2/m

VIII/F.01-70 Johannsenite CaMnSi2O6 C 2/c 2/m

VIII/F.01-80 Petedunnite Ca(Zn,Mn,Fe,Mg)Si2O6 C 2/c 2/m

VIII/F.01-90 Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 C 2/c 2/m

VIII/F.01-100 Omphacite (Ca,Na)(Mg,Fe,Al)Si2O6 P 2/n 2/m

VIII/F.01-110 Esseneite CaFeAlSiO6 C 2/c 2/m

VIII/F.01-120 Spodumene LiAlSi2O6 C 2/c 2/m

VIII/F.01-130 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m

VIII/F.01-140 Aegirine NaFeSi2O6 C 2/c 2/m

VIII/F.01-145 Namansilite NaMn(Si2O6) C 2/c 2/m

VIII/F.01-150 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m

VIII/F.01-160 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

VIII/F.01-170 Kosmochlor NaCrSi2O6 C 2/c 2/m

Other Hedenbergite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)

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Print or Cut-and-Paste your Hedenbergite Specimen Label here :

Hedenbergite

CaFe++Si2O6
Dana No: 65.1.3a.2 Strunz No: VIII/F.01-60
Locality:

Notes: