Mineralogy Database

Melonjosephite Mineral Data

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General Melonjosephite Information

Help on Chemical  Formula: Chemical Formula: CaFe++Fe+++(PO4)2(OH)
Help on Composition: Composition: Molecular Weight = 358.72 gm
   Calcium     11.17 %  Ca   15.63 % CaO
   Iron        31.14 %  Fe   20.03 % FeO / 22.26 % Fe2O3
   Phosphorus  17.27 %  P    39.57 % P2O5
   Hydrogen     0.28 %  H     2.51 % H2O
   Oxygen      40.14 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaFe2+Fe3+(PO4)2(OH)
Help on Environment: Environment: Replacing an alluaudite group mineral in a complex granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Angarf-Sud pegmatite, Tazenakht Plain, Anti-Atlas Mountains, Morocco. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Joseph Melon (1898-1991), Institute of Mineralogy, University of Liege, Liege, Belgium.
Help on Name Pronunciation: Name Pronunciation: Melonjosephite + Pronunciation Say MELONJOSEPHITE
Help on Synonym: Synonym: ICSD 100143
  PDF 25-1454

Melonjosephite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8802:1:0.5881
Help on Cell Dimensions: Cell Dimensions: a = 9.548, b = 10.847, c = 6.38, Z = 4; V = 660.76 Den(Calc)= 3.61
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.049(1), 5.418(0.92), 2.709(0.89),

Physical Properties of Melonjosephite

Help on Cleavage: Cleavage: {110} Perfect, {010} Indistinct
Help on Color: Color: Dark green, Black.
Help on Density: Density: 3.65
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Adamantine - Greasy
Help on Streak: Streak: greenish

Optical Properties of Melonjosephite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2114,KPDmeas= 0.2091,KC= 0.2216
Ncalc = 1.8 - 1.81
Help on Optical Data: Optical Data: Biaxial (-), a=1.72, b=1.77, g=1.8, bire=0.0800, 2V(Calc)=72, 2V(Meas)=80-85.

Calculated Properties of Melonjosephite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Melonjosephite =3.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.006944894
Boson Index = 0.993055106
Help on Photoelectric: Photoelectric: PEMelonjosephite = 11.52 barns/electron
U=PEMelonjosephite x rElectron Density= 40.57 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Melonjosephite is Not Radioactive

Melonjosephite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.05)Dana Group Melonjosephite CaFeFe(PO4)2(OH) Pbam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BG.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BG -With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
08.BG.10 Melonjosephite CaFeFe(PO4)2(OH) Pbam 2/m 2/m 2/m

Other Melonjosephite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Melonjosephite :
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: 08.BG.10





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