Schorlomite Mineral Data + Say SCHORLOMITE


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General Schorlomite Information

Help on Chemical  Formula: Chemical Formula: Ca3(Ti,Fe+++,Al)2[(Si,Fe+++,Fe++)O4]3
Help on Composition: Composition: Molecular Weight = 516.73 gm
   Calcium   23.27 %  Ca   32.56 % CaO
   Titanium  15.75 %  Ti   26.28 % TiO2
   Aluminum   0.52 %  Al    0.99 % Al2O3
   Iron      11.89 %  Fe    4.17 % FeO / 12.36 % Fe2O3
   Silicon   11.41 %  Si   24.42 % SiO2
   Oxygen    37.16 %  O
            ______        ______ 
            100.00 %      100.77 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Ti1.7Fe3+0.2Al0.13(Si0.7)3(Fe3+0.2)3(Fe2+0.1)3(O4)
Help on Environment: Environment: Alkaline igneous rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1846
Help on Locality: Locality: Magnet Cove, Hot Springs County, Arkansas. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the mineral schorl and from the Greek "homos," the same, in allusion to its resemblance to schorl.
Help on Synonym: Synonym: ICSD 76867
  PDF 33-285
 

Schorlomite Image

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Schorlomite

Comments: Lustrous massive black schorlomite.
Location: Magnet Cove, Hot Spring County, Arkansas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Schorlomite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.128, Z = 8; V = 1,783.89 Den(Calc)= 3.85
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): 2.712(1), 3.035(0.8), 2.475(0.6),
Help on Forms: Forms:

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Forms: [ 2 1 1]

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Peterson R C , Locock A J , Luth R W , The Canadian Mineralogist , 33 (1995) p.627-631, Positional disorder of oxygen in garnet: the crystal-structure, refinement of schorlomite, Sample: model 1

View Additional jPOWD Structure files for Schorlomite
[1] [2] [3]
 

Physical Properties of Schorlomite

Help on Cleavage: Cleavage: None
Help on Color: Color: Pitch black, Brownish black.
Help on Density: Density: 3.81 - 3.88, Average = 3.84
Help on Diaphaniety: Diaphaniety: Translucent to Subopaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 7-7.5 - Quartz-Garnet
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Metallic
Help on Streak: Streak: dark brown
 

Optical Properties of Schorlomite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2494,KPDmeas= 0.2497,KC= 0.2634
Help on Optical Data: Optical Data: Isotropic, n=1.94-1.98.
 

Calculated Properties of Schorlomite

Help on Electron Density: Electron Density:

relectron=3.76 gm/cc
note: rSchorlomite =3.85 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.02871
Boson Index = 0.97129
Help on Photoelectric: Photoelectric:

PESchorlomite = 9.47 barns/electron
U=PESchorlomite x relectron= 35.60 barns/cc.

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

Schorlomite is Not Radioactive

 

Schorlomite Classification

Help on  Dana Class: Dana Class: 51.4.3c.1 (51)Nesosilicate Insular SiO4 Groups Only
  (51.4)with cations in [6] and >[6] coordination
  (51.4.3c)Garnet group (Schorlomite - Kimzeyite series)
 
51.4.3c.1 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m
 
51.4.3c.2 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m
 
51.4.3c.3 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m
Help on  Strunz Class: Strunz Class: VIII/A.08-120 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 Schorlomite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Schorlomite :
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 - Scandinavian mineral gallery 16 - WWW-MINCRYST 17 -École des Mines de Paris

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Schorlomite

Ca3(Ti,Fe+++,Al)2[(Si,Fe+++,Fe++)O4]3
Dana No: 51.4.3c.1 Strunz No: VIII/A.08-120
Locality:

 

Notes:

 

 
   
 
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