Hypersthene Mineral Data

Hypersthene Mineral Data

[Fine Minerals] [What's New] [Mineral Galleries] [My Collection] [Mineral Auctions]
Dan Weinrich Fine Minerals
Full-time professional mineral dealer with over 31 years experience in mineral collecting
And 15 years selling mineral specimens on the internet and at major mineral shows

General Hypersthene Information

Chemical Formula:

(Mg,Fe++)2Si2O6

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

Empirical Formula:

MgFe²⁺Si₂O₆

Environment:

Minerals of basic igneous rocks and meteorites. Intermediate in composition between enstatite and ferrosilite

IMA Status:

Discredited IMA 1988

Locality:

Dark plutonic rocks of the Adirondack Mountain region of New York, especially the North Creek garnet occurrences. Link to MinDat.org Location Data.

Name Origin:

From in the Greek hyper - "above" and stenos - "power."

Synonym:

Bronzite

Hypersthene Image

Images:

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

Axial Ratios:

a:b:c =2.0611:1:0.5889

Cell Dimensions:

a = 18.2, b = 8.83, c = 5.2, Z = 8; V = 835.67 Den(Calc)= 3.69

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m)

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Domeneghetti M C , Molin G M , Stimpfl M , Tribaudino M , American Mineralogist , 80 (1995) p.923-929, Orthopyroxene from the Serra de Mage meteorite: Structure refinement and, estimation of C2/c pyroxene contributions to apparent Pbca diffraction, violations, Sample: OPX SDM N.13, natural

View Additional jPOWD Structure files for Hypersthene
[1]

Physical Properties of Hypersthene

Cleavage:

[100] Perfect, [010] Perfect

Color:

Grayish white, Greenish white, Yellowish white, Bronzy brown, Grayish black.

Density:

3.2 - 3.9, Average = 3.55

Diaphaniety:

Translucent to transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luminescence:

None.

Luster:

Vitreous - Silky

Streak:

grayish greenish white

Optical Properties of Hypersthene

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

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.

Pleochroism (x):

pink, brownish pink, pale yellow, pale red, or colorless.

Pleochroism (y):

pinkish yellow, greenish yellow, yellow, light green, or colorless.

Pleochroism (z):

light green, bluish green, grayish green, blue, or colorless.

Calculated Properties of Hypersthene

Electron Density:

r_electron=3.48 gm/cc
note: r_Hypersthene=3.55 gm/cc.

Fermion Index

Fermion Index = 0.02704
Boson Index = 0.97296

Photoelectric:

PE_Hypersthene= 8.29 barns/electron
U=PE_Hypersthene x r_electron= 28.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hypersthene is Not Radioactive

Hypersthene Classification

Dana Class:

65.0.0.0 (65)Inosilicate Minerals

(65.0)Without Dana Classification Numbers

(Pyroxenes, Ortho)

Strunz Class:

VIII/F.02-00 VIII - Silicates

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

VIII/F.02 - Pyroxene group, Orthopyroxene

Other Hypersthene Information

References:

NAME( Pough60) PHYS. PROP.(Pough60) OPTIC PROP.(Heinrich65)

See Also:

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

Search for Hypersthene using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Hypersthene :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

The GeoZone

Wrights Rock Shop

Translate Hypersthene Mineral Data :

Ask about Hypersthene here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Hypersthene

(Mg,Fe++)2Si2O6
Dana No: Unknown Strunz No: VIII/F.02-00
Locality:

Notes: