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Moraesite Mineral Data

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General Moraesite Information

Help on Chemical  Formula: Chemical Formula: Be2(PO4)(OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 202.06 gm
   Beryllium    8.92 %  Be   24.76 % BeO
   Phosphorus  15.33 %  P    35.12 % P2O5
   Hydrogen     4.49 %  H    40.12 % H2O
   Oxygen      71.26 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Be2(PO4)(OH)•4(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1953
Help on Locality: Locality: Sapucaia pegmatite, Gelileia, Minas Gerias, Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Liciano Jacques de Moraes (1896-1968), Brazilian geologist and mineral collector.
Help on Name Pronunciation: Name Pronunciation: Moraesite + Pronunciation Say MORAESITE
Help on Synonym: Synonym: ICSD 36587
  PDF 29-1257

Moraesite Image

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Comments: Silky, tufted crystals of white moraesite on matrix.
Location: Divino das Laranjeiras, Minas Gerais, Brazil. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Glucine   Moraesite

Comments: Light brown glucine with white moraesite.
Location: Boevskoye Mine, Sverdlovsk District, Middle Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Moraesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6942:1:0.5808
Help on Cell Dimensions: Cell Dimensions: a = 8.553, b = 12.319, c = 7.155, Z = 4; beta = 97.93° V = 746.67 Den(Calc)= 1.80
Help on Crystal System: Crystal System: Monoclinic Space Group: Cc,C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7(1), 3.278(0.9), 4.24(0.6),

Physical Properties of Moraesite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: White.
Help on Density: Density: 1.805
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Streak: Streak: white

Optical Properties of Moraesite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2656,KPDmeas= 0.2648,KC= 0.2601
Ncalc = 1.47
Help on Optical Data: Optical Data: Biaxial (-), a=1.462, b=1.482, g=1.49, bire=0.0280, 2V(Calc)=62, 2V(Meas)=65.

Calculated Properties of Moraesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.86 gm/cc
note: Specific Gravity of Moraesite =1.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEMoraesite = 0.93 barns/electron
U=PEMoraesite x rElectron Density= 1.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Moraesite is Not Radioactive

Moraesite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.06)where (AB)2 (XO4) Zq � x(H2O)
  (42.06.01)Moraesite Group Moraesite Be2(PO4)(OH)•4(H2O) Cc,C 2/c Mono Bearsite Be2(AsO4)(OH)•4(H2O) Cc or C 2/c Mono
Help on  Strunz Class: Strunz Class: 08.DA.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DA -With small (and occasionally larger) cations
08.DA.05 Bearsite Be2(AsO4)(OH)•4(H2O) Cc or C 2/c Mono
08.DA.05 Moraesite Be2(PO4)(OH)•4(H2O) Cc,C 2/c Mono

Other Moraesite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Moraesite :
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.DA.05





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