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Kornerupine Mineral Data

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General Kornerupine Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)4Al6(SiO4,BO4)5(O,OH)2
Help on Composition: Composition: Molecular Weight = 734.04 gm
   Sodium      0.03 %  Na    0.04 % Na2O
   Lithium     0.04 %  Li    0.08 % Li2O
   Calcium     0.05 %  Ca    0.08 % CaO
   Magnesium  11.52 %  Mg   19.11 % MgO
   Titanium    0.07 %  Ti    0.11 % TiO2
   Aluminum   24.48 %  Al   46.26 % Al2O3
   Iron        1.22 %  Fe    1.57 % FeO
   Silicon    14.04 %  Si   30.04 % SiO2
   Boron       0.46 %  B     1.47 % B2O3
   Hydrogen    0.14 %  H     1.21 % H2O
   Oxygen     47.93 %  O
   Fluorine    0.03 %  F     0.03 % F
                -   %   F    -0.01 % -O=F2    
             ______        ______ 
             100.00 %       99.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3.48Fe2+0.16Li0.04Ca0.01Na0.01Al5.64Ti0.01Si3.67Al1.02B0.31O21(OH)0.99F0.01
Help on Environment: Environment: In boron-rich volcanic and sedimentary rocks subjected to amphibolite to granulite facies metamorphism; in metamorphosed anorthosite complexes
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1884
Help on Locality: Locality: Fiskernaes, SW Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Danish geologist, Andreas Nikolaus Kornerup (1857-1881).
Help on Name Pronunciation: Name Pronunciation: Kornerupine + Pronunciation Say KORNERUPINE
Help on Synonym: Synonym: ICSD 68636
  PDF 29-852

Kornerupine Image

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Comments: Greenish gray mottled crystal prism of kornerupine.
Location: Western Hart's Range, Northern Territory, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kornerupine Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1669:1:0.4885
Help on Cell Dimensions: Cell Dimensions: a = 16.041, b = 13.746, c = 6.715, Z = 4; V = 1,480.65 Den(Calc)= 3.29
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mcm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.639(1), 3.03(0.8), 2.118(0.6),3.37(0.6), 1.503(0.4), 1.685(0.3), 2.096(0.3),

Physical Properties of Kornerupine

Help on Cleavage: Cleavage: {110} Indistinct
Help on Color: Color: Brown, Colorless, Green, Greenish yellow, Yellow.
Help on Density: Density: 3.3 - 3.34, Average = 3.32
Help on Diaphaneity: Diaphaneity: Translucent to opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 7 - Quartz
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Kornerupine

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2049,KPDmeas= 0.2031,KC= 0.2076
Ncalc = 1.68 - 1.69
Help on Optical Data: Optical Data: Biaxial (-), a=1.66-1.671, b=1.673-1.683, g=1.674-1.684, bire=0.0130-0.0140, 2V(Calc)=30-32, 2V(Meas)=3-48. Dispersion r > v or r < v.
Help on Pleochroism (x): Pleochroism (x): colorless, green, or green.
Help on Pleochroism (y): Pleochroism (y): colorless, pale brownish yellow, or pale yellowish green.

Calculated Properties of Kornerupine

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.25 gm/cc
note: Specific Gravity of Kornerupine =3.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEKornerupine = 1.89 barns/electron
U=PEKornerupine x rElectron Density= 6.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kornerupine is Not Radioactive

Kornerupine Classification

Help on  Dana Class: Dana Class: (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.01)with cations in [4] and higher coordination; single and double groups (n=1,2)
  (58.01.01)Kornerupine Group Kornerupine (Mg,Fe)4Al6(SiO4,BO4)5(O,OH)2 C mcm 2/m 2/m 2/m Prismatine! ([],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 C mcm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BJ.50 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BJ -Sorosilicates with Si3O10, Si4O11, etc
09.BJ.50 Kornerupine (Mg,Fe)4Al6(SiO4,BO4)5(O,OH)2 C mcm 2/m 2/m 2/m
09.BJ.50 Prismatine! ([],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 C mcm 2/m 2/m 2/m

Other Kornerupine Information

Help on See Also: See Also: Links to other databases for Kornerupine :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - Tradeshop.com - The Rainbow of Gems

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Dana No: Strunz No: 09.BJ.50





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