Pyrope Mineral Data + Say PYROPE

General Pyrope Information
Help on Chemical Formula: Chemical Formula: Mg3Al2(SiO4)3
Help on Composition: Composition: Molecular Weight = 403.13 gm
   Magnesium  18.09 %  Mg   29.99 % MgO
   Aluminum   13.39 %  Al   25.29 % Al2O3
   Silicon    20.90 %  Si   44.71 % SiO2
   Oxygen     47.63 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3Al2(SiO4)3
Help on Environment: Environment: Ultra basic igneous rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1803
Help on Locality: Locality: Zoblitz, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, pyropos, "fiery-eyed" in allusion to the red hue.
Help on Synonym: Synonym: ICSD 71887
  PDF 15-742
  Rhodolite
 

Pyrope Image

Click Here for Larger Pyrope Image in a New Browser Window Images:
Click Here for Larger Pyrope Image

Pyrope

Comments: Transparent, dark-red pyrope garnet.
Location: Governador Valadares, Rio Doce, Minas Gerais, Southeast Region, Brazil. Scale: 6x6x6 mm.
© John Betts - Fine Minerals

Pyrope Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 11.459, Z = 8; V = 1,504.67 Den(Calc)= 3.56
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I a3d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.54(1), 2.58(1), 2.88(0.6),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 2 1 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Pyrope Structure Window 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


Gibbs G V , Smith J V , American Mineralogist , 50 (1965) p.2023-2039, Refinement of the crystal structure of synthetic pyrope, refinement D, note that temperature factors reported for Si were labelled, incorrectly in the paper

View Additional jPOWD Structure files for Pyrope
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [3] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Pyrope

Help on Cleavage: Cleavage: None
Help on Color: Color: Blood red, Orange red, Purple red, Pink, Black red.
Help on Density: Density: 3.65 - 3.84, Average = 3.74
Help on Diaphaniety: Diaphaniety: Transparent to subtranslucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Pyrope

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2093,KPDmeas= 0.1989,KC= 0.2053
Help on Optical Data: Optical Data: Isotropic, n=1.73-1.76.
 

Calculated Properties of Pyrope

Help on Electron Density: Electron Density:

relectron=3.53 gm/cc
note: rPyrope =3.56 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02807
Boson Index = 0.97193
Help on Photoelectric: Photoelectric:

PEPyrope = 1.59 barns/electron
U=PEPyrope x relectron= 5.63 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Pyrope is Not Radioactive
 

Pyrope Classification
Help on Dana Class: Dana Class: 51.4.3a.1 (51)Nesosilicate Insular SiO4 Groups Only
  (51.4)with cations in [6] and >[6] coordination
  (51.4.3a)Garnet group (Pyralspite series)
 
51.4.3a.1 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m
 
51.4.3a.2 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m
 
51.4.3a.3 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m
 
51.4.3a.4 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m
 
51.4.3a.5 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m
 
51.4.3a.6 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m
Help on Strunz Class: Strunz Class: VIII/A.08-10 VIII - Silicates
  VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6]
  VIII/A.08 - Garnet group, Pyrope - Henritermierite
 
VIII/A.08-10 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-20 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-30 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-40 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-50 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-60 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-70 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-80 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m
 
VIII/A.08-90 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m
 
VIII/A.08-100 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m
 
VIII/A.08-110 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-120 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m
 
VIII/A.08-125 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m
 
VIII/A.08-130 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-138 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-140 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m
 
VIII/A.08-150 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m
 
VIII/A.08-160 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 41/acd 4/m 2/m 2/m
 

Other Pyrope Information
Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Sinkankas66)
Help on See Also: See Also: Links to other databases for Pyrope :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - CalTech Mineral Spectroscopy 6 - Crocoite.com Mineral Locations 7 - EUROmin Project 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (MinSocAm) 11 -Handbook of Mineralogy (UofA) 12 -MinDAT 13 -MinMax(Deutsch) 14 -MinMax(English) 15 - Mineral and Gemstone Kingdom 16 -Mineral of the Month 17 -Mineralienatlas (Deutsch) 18 -QUT Mineral Atlas 19 - Scandinavian mineral gallery 20 - Tradeshop.com - The Rainbow of Gems 21 - UCLA - Petrography Thin-Sections 22 -University of Colorado - Mineral Structure Data 23 -University of Texas at Austin 24 - WWW-MINCRYST 25 -École des Mines de Paris

Search for Pyrope using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Pyrope :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Pyrope Mineral Data :

Ask about Pyrope 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 Pyrope Specimen Label here :

Pyrope

Mg3Al2(SiO4)3
Dana No: 51.4.3a.1 Strunz No: VIII/A.08-10
Locality:

 

Notes:

 
 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links