Fransoletite Mineral Data

Fransoletite Mineral Data
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General Fransoletite Information

Help on Chemical Formula: Chemical Formula: H2Ca3Be2(PO4)4•4(H2O)
Help on Composition: Composition: Molecular Weight = 592.22 gm
   Calcium     20.30 %  Ca   28.41 % CaO
   Beryllium    3.04 %  Be    8.45 % BeO
   Phosphorus  20.92 %  P    47.94 % P2O5
   Hydrogen     1.70 %  H    15.21 % H2O
   Oxygen      54.03 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: H2Ca3Be2(PO4)4•4(H2O)
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Tip Top pegmatite, Custer, Custer County, South Dakota, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for A.M. Fransolet
Help on Name Pronunciation: Name Pronunciation: Fransoletite + Pronunciation Say FRANSOLETITE
Help on Synonym: Synonym: ICSD 40670
  PDF 35-629
 

Fransoletite Image

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Fransoletite

Comments: Light blue crystals of fransoletite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Fransoletite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4881:1:0.4695
Help on Cell Dimensions: Cell Dimensions: a = 7.348, b = 15.052, c = 7.068, Z = 2; beta = 96.519° V = 776.68 Den(Calc)= 2.53
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.044(1), 3.47(0.9), 3.32(0.7),
Click Here for Large Fransoletite Structure Window Crystal Structure:

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Kampf A R , American Mineralogist , 77 (1992) p.848-856, Beryllophosphate chains in the structures of fransoletite, parafransoletite, and, ehrleite and some general comments on beryllophosphate linkages

 

Physical Properties of Fransoletite

Help on Cleavage: Cleavage: {010} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.56
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Fransoletite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2256,KPDmeas= 0.2229,KC= 0.2194
Ncalc = 1.55 - 1.56
Help on Optical Data: Optical Data: Biaxial (+), a=1.56, b=1.566, g=1.586, bire=0.0260, 2V(Calc)=58, 2V(Meas)=25.
 

Calculated Properties of Fransoletite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.58 gm/cc
note: Specific Gravity of Fransoletite =2.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEFransoletite = 3.53 barns/electron
U=PEFransoletite x rElectron Density= 9.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fransoletite is Not Radioactive
 

Fransoletite Classification
Help on Dana Class: Dana Class: 40.05.01.01 (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.01)Dana Group
 
40.05.01.01 Fransoletite H2Ca3Be2(PO4)4•4(H2O) P 21/a 2/m
Help on Strunz Class: Strunz Class: 08.CA.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CA -With small and large/medium cations
 
08.CA.05 Fransoletite H2Ca3Be2(PO4)4•4(H2O) P 21/a 2/m
 
08.CA.05 Parafransoletite Ca3Be2(PO4)2(PO3,OH)2•4(H2O) P1 1
 

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

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Fransoletite

H2Ca3Be2(PO4)4•4(H2O)
Dana No: 40.05.01.01 Strunz No: 08.CA.05
Locality:

 

Notes: