Mineralogy Database

Hypersthene Mineral Data

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General Hypersthene Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)2Si2O6
Help on Composition: Composition: Molecular Weight = 232.32 gm
   Magnesium  10.46 %  Mg   17.35 % MgO
   Iron       24.04 %  Fe   30.93 % FeO
   Silicon    24.18 %  Si   51.73 % SiO2
   Oxygen     41.32 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgFe2+Si2O6
Help on Environment: Environment: Minerals of basic igneous rocks and meteorites. Intermediate in composition between enstatite and ferrosilite
Help on IMA Status: IMA Status: Discredited IMA 1988 - Valid Species (Pre-IMA)
Help on Locality: Locality: Dark plutonic rocks of the Adirondack Mountain region of New York, especially the North Creek garnet occurrences. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From in the Greek hyper - "above" and stenos - "power."
Help on Synonym: Synonym: Bronzite
 

Hypersthene Image

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  Hypersthene   Almandine

Comments: Dark green blocky crystals hypersthene with reddish almandine.
Location: Barton Garnet Mine, North Creek, Warren County, Adirondacks, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hypersthene Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.0611:1:0.5889
Help on Cell Dimensions: Cell Dimensions: a = 18.2, b = 8.83, c = 5.2, Z = 8; V = 835.67 Den(Calc)= 3.69
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m)
 

Physical Properties of Hypersthene

Help on Cleavage: Cleavage: {100} Perfect, {010} Perfect
Help on Color: Color: Grayish white, Greenish white, Yellowish white, Bronzy brown, Grayish black.
Help on Density: Density: 3.2 - 3.9, Average = 3.55
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: grayish greenish white
 

Optical Properties of Hypersthene

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1949,KPDmeas= 0.2025,KC= 0.2004
Ncalc = 1.64 - 1.78
Help on Optical Data: Optical Data: Biaxial (-), a=1.669-1.755, b=1.674-1.763, g=1.68-1.773, bire=0.0110-0.0180, 2V(Calc)=86, 2V(Meas)=70-90. Dispersion weak, r < v.
Help on Pleochroism (x): Pleochroism (x): pink, brownish pink, pale yellow, pale red, or colorless.
Help on Pleochroism (y): Pleochroism (y): pinkish yellow, greenish yellow, yellow, light green, or colorless.
 

Calculated Properties of Hypersthene

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.48 gm/cc
note: Specific Gravity of Hypersthene =3.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEHypersthene = 8.29 barns/electron
U=PEHypersthene x rElectron Density= 28.88 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hypersthene is Not Radioactive
 

Hypersthene Classification

Help on  Dana Class: Dana Class: 65.00.00.00 (65)Inosilicate Minerals
  (65.00)Without Dana Classification Numbers
  (65.00.00)Pyroxenes, Ortho
 
65.00.00.00 Ashcroftine-(Ce)* K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8•8(H2O) I 4/mmm 4/m 2/m 2/m
 
65.00.00.00 Brokenhillite* (Mn,Fe)32[Si24O60]OH29Cl11 P 63mc 6mm
 
65.00.00.00 Grossmanite CaTiAlSiO6 C 2/m 2/m
 
65.00.00.00 Hypersthene? (Mg,Fe)2Si2O6 2/m 2/m 2/m
 
65.00.00.00 IMA2007-015 K(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m
 
65.00.00.00 IMA2008-070 NaLi2(Fe2Al2Li)(Si6Al2)O22F2 C 2/m 2/m
 
65.00.00.00 IMA2009-010 [Ba6(PO4)2(CO3)][Fe7(OH)4Fe2O2(SiO3)8] P1 1
 
65.00.00.00 IMA2009-012 NaNa2(Mg2Al2Li)Si8O22F2 C 2/m 2/m
 
65.00.00.00 Kushiroite CaAl2SiO6 C 2/c 2/m
 
65.00.00.00 Plumalsite* Pb4Al2(SiO3)7(?) Unk Ortho
Help on  Strunz Class: Strunz Class: 09.DX.00 09 - SILICATES (Germanates)
  09.D - Unclassified Strunz Inosilicates
  09.DX -Pyroxenes, Ortho
 
09.DX.00 Hypersthene? (Mg,Fe)2Si2O6 2/m 2/m 2/m
 
09.DX.00 Plumalsite* Pb4Al2(SiO3)7(?) Unk Ortho
 
09.DX.00 IMA2008-070 NaLi2(Fe2Al2Li)(Si6Al2)O22F2 C 2/m 2/m
 
09.DX.00 IMA2007-015 K(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m
 
09.DX.00 Tanohataite! LiMn2Si3O8(OH) P1 1
 
09.DX.00 Punkaruaivite! Li{Ti2(OH)2[Si4O11(OH)]}•H2O C 2/c 2/m
 
09.DX.00 Yegorovite! Na4[Si2O4(OH)2]2•7H2O P 21/c 2/m
 
09.DX.00 Kushiroite CaAl2SiO6 C 2/c 2/m
 
09.DX.00 Grossmanite CaTiAlSiO6 C 2/m 2/m
 
09.DX.00 IMA2009-009 KNa2Li(Mg,Fe)2Ti2Si8O24 C 2/m 2/m
 
09.DX.00 IMA2009-010 [Ba6(PO4)2(CO3)][Fe7(OH)4Fe2O2(SiO3)8] P1 1
 
09.DX.00 IMA2009-012 NaNa2(Mg2Al2Li)Si8O22F2 C 2/m 2/m
 

Other Hypersthene Information

Help on See Also: See Also: Links to other databases for Hypersthene :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Minerals in Thin Section-University of North Carolina
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - UCLA - Petrography Thin-Sections
14 - WWW-MINCRYST

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Hypersthene

(Mg,Fe++)2Si2O6
Dana No: 65.00.00.00 Strunz No: 09.DX.00
Locality:

 

Notes:

 

 


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