Spessartine Mineral Data + Say SPESSARTINE

General Spessartine Information
Help on Chemical Formula: Chemical Formula: Mn++3Al2(SiO4)3
Help on Composition: Composition: Molecular Weight = 495.03 gm
   Manganese  33.29 %  Mn   42.99 % MnO
   Aluminum   10.90 %  Al   20.60 % Al2O3
   Silicon    17.02 %  Si   36.41 % SiO2
   Oxygen     38.78 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+3Al2(SiO4)3
Help on Environment: Environment: Magmatic, metamorphic, and pegmatitic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Aschaffenburg, Spessart Mountains, Bavaria, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Synonym: Synonym: Spessartite
 

Spessartine Image

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Spessartine

Comments: Dodecahedral crystal of spessartine garnet on matrix.
Location: Haramosh Mountains, Baltistan, Northern Areas, Pakastan. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Spessartine Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 11.621, Z = 8; V = 1,569.39 Den(Calc)= 4.19
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): 2.6(1), 1.56(0.4), 1.61(0.3),
Help on Forms: Forms:

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Forms: [ 2 1 1]

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Novak G A , Gibbs G V , American Mineralogist , 56 (1971) p.791-825, The crystal chemistry of the silicate garnets, sample Sp

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

Physical Properties of Spessartine

Help on Cleavage: Cleavage: [???] Distinct
Help on Color: Color: Red, Reddish orange, Yellowish brown, Reddish brown, Brown.
Help on Density: Density: 4.18
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 6.5-7.5
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Spessartine

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.058 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.06 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1909,KPDmeas= 0.1914,KC= 0.2031
Help on Optical Data: Optical Data: Isotropic, n=1.8.
 

Calculated Properties of Spessartine

Help on Electron Density: Electron Density:

relectron=4.04 gm/cc
note: rSpessartine =4.18 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00813
Boson Index = 0.99187
Help on Photoelectric: Photoelectric:

PESpessartine = 9.50 barns/electron
U=PESpessartine x relectron= 38.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Spessartine is Not Radioactive
 

Spessartine Classification
Help on Dana Class: Dana Class: 51.4.3a.3 (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.08-30 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 Spessartine Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Spessartine :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Applied Mineralogy 6 -Athena 7 - Crocoite.com Mineral Locations 8 - EUROmin Project 9 - Franklin Minerals(Dunn) 10 -Google Images 11 -Google Scholar 12 -Handbook of Mineralogy (MinSocAm) 13 -Handbook of Mineralogy (UofA) 14 - HyperPhysics 15 -MinDAT 16 -MinMax(Deutsch) 17 -MinMax(English) 18 - Mineral and Gemstone Kingdom 19 -Mineral of the Month 20 -Mineralienatlas (Deutsch) 21 - Minerals of Wisconsin 22 -QUT Mineral Atlas 23 - Scandinavian mineral gallery 24 - UCLA - Petrography Thin-Sections 25 -University of Colorado - Mineral Structure Data 26 -University of Texas at Austin 27 - WWW-MINCRYST 28 -École des Mines de Paris

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Spessartine

Mn++3Al2(SiO4)3
Dana No: 51.4.3a.3 Strunz No: VIII/A.08-30
Locality:

 

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