Kvanefjeldite Mineral Data

Kvanefjeldite Mineral Data
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General Kvanefjeldite Information

Help on Chemical Formula: Chemical Formula: Na4(Ca,Mn)Si6O14(OH)2
Help on Composition: Composition: Molecular Weight = 562.27 gm
   Sodium     16.35 %  Na   22.05 % Na2O
   Calcium     5.35 %  Ca    7.48 % CaO
   Manganese   2.44 %  Mn    3.15 % MnO
   Silicon    29.97 %  Si   64.12 % SiO2
   Hydrogen    0.36 %  H     3.20 % H2O
   Oxygen     45.53 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na4Ca0.75Mn2+0.25Si6O14(OH)2
Help on Environment: Environment: As patches, streaks, and veinlets cutting arfvedsonite-bearing nepheline syenite; probably of late-stage hydrothermal origin.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: On the Kvanefjeld Plateau, in the Ilimaussaq intrusion, southern Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality, which is Danish for the mountain where the angelica grows.
Help on Name Pronunciation: Name Pronunciation: Kvanefjeldite + Pronunciation Say KVANEFJELDITE
Help on Synonym: Synonym: ICSD 31260
  PDF 37-4330
 

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Kvanefjeldite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6432:1:0.5704
Help on Cell Dimensions: Cell Dimensions: a = 10.213, b = 15.878, c = 9.058, Z = 4; V = 1,468.86 Den(Calc)= 2.54
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcab
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.12(1), 3.88(0.7), 4.36(0.7),
Click Here for Large Kvanefjeldite Structure Window Crystal Structure:

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Johnsen O , Leonardsen E S , Falth L , Annehed H , Neues Jahrbuch fur Mineralogie, Monatshefte , 1983 (1983) p.505-512, Crystal structure of kvanefjeldite: The introduction of [Si3O7OH], layers with eight-membered rings, Locality: Ilimaussaq alkaline intrusion, South Greenland

 

Physical Properties of Kvanefjeldite

Help on Cleavage: Cleavage: {010} Good, {101} Indistinct
Help on Color: Color: Violet pink.
Help on Density: Density: 2.55
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Kvanefjeldite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2083,KPDmeas= 0.2075,KC= 0.2081
Ncalc = 1.53
Help on Optical Data: Optical Data: Biaxial (+), a=1.522, b=1.522, g=1.543, bire=0.0210, 2V(Calc)=0, 2V(Meas)=0-9.
 

Calculated Properties of Kvanefjeldite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Kvanefjeldite =2.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEKvanefjeldite = 2.68 barns/electron
U=PEKvanefjeldite x rElectron Density= 6.77 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kvanefjeldite is Not Radioactive
 

Kvanefjeldite Classification
Help on Dana Class: Dana Class: 72.05.03.01 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.05)with corrugated and complex layers
  (72.05.03)Dana Group
 
72.05.03.01 Kvanefjeldite Na4(Ca,Mn)Si6O14(OH)2 Pcab 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 09.DP.30 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DP -Transitional ino-phyllosilicate structures
 
09.DP.30 Kvanefjeldite Na4(Ca,Mn)Si6O14(OH)2 Pcab 2/m 2/m 2/m
 

Other Kvanefjeldite Information
Help on References: References: NAME( AntBidBlaNic2) 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 Kvanefjeldite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Kvanefjeldite Specimen Label here :

Kvanefjeldite

Na4(Ca,Mn)Si6O14(OH)2
Dana No: 72.05.03.01 Strunz No: 09.DP.30
Locality:

 

Notes: