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Meliphanite Mineral Data

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General Meliphanite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na)2Be[(Si,Al)2O6(F,OH)]
Help on Composition: Composition: Molecular Weight = 241.15 gm
   Sodium      9.53 %  Na   12.85 % Na2O
   Calcium    16.62 %  Ca   23.25 % CaO
   Beryllium   3.74 %  Be   10.37 % BeO
   Aluminum   11.19 %  Al   21.14 % Al2O3
   Silicon    11.65 %  Si   24.92 % SiO2
   Hydrogen    0.21 %  H     1.87 % H2O
   Oxygen     43.13 %  O
   Fluorine    3.94 %  F     3.94 % F
                -   %   F    -1.66 % -O=F2    
             ______        ______ 
             100.00 %       96.68 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaNaBeSiAlO6F0.5(OH)0.5
Help on Environment: Environment: Nepheline-syenite pegmatite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1852
Help on Locality: Locality: Langesundfiord district of southern Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "honey" and "to appear" in allusion to the color.
Help on Name Pronunciation: Name Pronunciation: Meliphanite + Pronunciation Say MELIPHANITE
Help on Synonym: Synonym: Melinophane

Meliphanite Image

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Comments: Honey yellow, translucent sample of Meliphanite.
Location: Aroy, Langesundsfjorden, Norway. Scale: 3.6 X 5.3 cm.
© John Veevaert

Meliphanite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.94018
Help on Cell Dimensions: Cell Dimensions: a = 10.516, c = 9.887, Z = 8; V = 1,093.37 Den(Calc)= 2.93
Help on Crystal System: Crystal System: Tetragonal - Disphenoidal H-M Symbol (4) Space Group: I 4
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.759(1), 2.97(0.39), 3.601(0.37),

Physical Properties of Meliphanite

Help on Cleavage: Cleavage: {010} Perfect, {001} Distinct
Help on Color: Color: Colorless, Yellow, Yellowish red, Red.
Help on Density: Density: 3.01 - 3.03, Average = 3.01
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Meliphanite

Help on Dichroism (e): Dichroism (e): yellow.
Help on Dichroism (w): Dichroism (w): dark yellow.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2166,KPDmeas= 0.2102,KC= 0.2019
Ncalc = 1.59 - 1.61
Help on Optical Data: Optical Data: Uniaxial (-), e=1.592-1.672, w=1.611-1.664, bire=0.0080-0.0190.

Calculated Properties of Meliphanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Meliphanite =3.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEMeliphanite = 3.05 barns/electron
U=PEMeliphanite x rElectron Density= 9.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Meliphanite is Not Radioactive

Meliphanite Classification

Help on  Dana Class: Dana Class: (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.04)with cations in [8] and lower coordination
  (55.04.02)Fresnoite group Fresnoite Ba2TiSi2O8 P 4bm 4mm Hardystonite Ca2ZnSi2O7 P 421m 4 2m Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2 Leucophanite (Na,Ca)2BeSi2(O,OH,F)7 P1 1 Meliphanite (Ca,Na)2Be[(Si,Al)2O6(F,OH)] I 4 4 Gugiaite Ca2BeSi2O7 P 421m 4 2m
Help on  Strunz Class: Strunz Class: 09.DP.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DP -Transitional ino-phyllosilicate structures
09.DP.05 Meliphanite (Ca,Na)2Be[(Si,Al)2O6(F,OH)] I 4 4

Other Meliphanite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Meliphanite :
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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Dana No: Strunz No: 09.DP.05





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