Majorite Mineral Data + Say MAJORITE

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General Majorite Information

Help on Chemical  Formula: Chemical Formula: Mg3(Fe,Al,Si)2(SiO4)3
Help on Composition: Composition: Molecular Weight = 437.99 gm
   Magnesium  16.65 %  Mg   27.61 % MgO
   Aluminum    3.70 %  Al    6.98 % Al2O3
   Iron       15.30 %  Fe   21.88 % Fe2O3
   Silicon    20.52 %  Si   43.90 % SiO2
   Oxygen     43.84 %  O
             ______        ______ 
             100.00 %      100.37 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3Fe3+1.2Al0.6Si0.2(SiO4)3
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 27373
  PDF 25-843
 

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Majorite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 11.524, Z = 8; V = 1,530.42 Den(Calc)= 3.80
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),
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Forms: [ 2 1 1]

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Hazen R M , Downs R T , Finger L W , Conrad P G , Gasparik T , American Mineralogist , 79 (1994) p.581-584, Crystal chemistry of Ca-bearing majorite

View Additional jPOWD Structure files for Majorite
[1] [10] [2] [3] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Majorite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow brown, Purple red.
Help on Density: Density: 4
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Hardness: Hardness: 7-7.5 - Quartz-Garnet
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Majorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.13 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.084 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2105,KPDmeas= 0.2,KC= 0.2299
Help on Optical Data: Optical Data: Isotropic, n=1.8.
 

Calculated Properties of Majorite

Help on Electron Density: Electron Density:

relectron=3.74 gm/cc
note: rMajorite =3.80 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.02968
Boson Index = 0.97032
Help on Photoelectric: Photoelectric:

PEMajorite = 5.79 barns/electron
U=PEMajorite x relectron= 21.69 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Majorite is Not Radioactive

 

Majorite Classification

Help on  Dana Class: Dana Class: 51.4.3a.5 (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.08-60 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 Majorite Information

Help on References: References: 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 Majorite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 - Mineral and Gemstone Kingdom 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 -École des Mines de Paris

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Majorite

Mg3(Fe,Al,Si)2(SiO4)3
Dana No: 51.4.3a.5 Strunz No: VIII/A.08-60
Locality:

 

Notes:

 

 
   
 
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