Parafransoletite Mineral Data

Parafransoletite Mineral Data
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General Parafransoletite Information

Help on Chemical Formula: Chemical Formula: Ca3Be2(PO4)2(PO3,OH)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 527.22 gm
   Calcium     22.81 %  Ca   31.91 % CaO
   Beryllium    3.42 %  Be    9.49 % BeO
   Phosphorus  20.56 %  P    47.12 % P2O5
   Hydrogen     1.63 %  H    14.52 % H2O
   Oxygen      51.59 %  O
              ______        ______ 
              100.00 %      103.03 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Be2(PO4)2(PO3)1.5(OH)0.5•4(H2O)
Help on Environment: Environment: Secondary phosphate mineral in a pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1990
Help on Locality: Locality: Tip Top Pegmatite, Black Hills, Custer County, South Dakota, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for it's dimorphous relatinship with fransoltite.
Help on Name Pronunciation: Name Pronunciation: Parafransoletite + Pronunciation Say PARAFRANSOLETITE
Help on Synonym: Synonym: ICSD 40671
  IMA1989-049
  PDF 47-1830
 

Parafransoletite Image

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Parafransoletite   Roscherite

Comments: White, crystalline aggregate sprays of parafransoletite on dark reddish brown roscherite with massive, white, sucrosic whitlockite.
Location: Tip Top mine, Custer County, South Dakota, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Parafransoletite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.952:1:0.9174
Help on Cell Dimensions: Cell Dimensions: a = 7.327, b = 7.696, c = 7.061, Z = 1; alpha = 94.903°, beta = 96.82°, gamma = 101.865° V = 385.48 Den(Calc)= 2.27
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.032(1), 3.619(0.8), 2.595(0.6),
Click Here for Large Parafransoletite 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 Parafransoletite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.54
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spear Head - Crystals are long, pointed and shaped like spearheads.
Help on Habit: Habit: Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white
 

Optical Properties of Parafransoletite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.112 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2506,KPDmeas= 0.2249,KC= 0.2254
Ncalc = 1.51 - 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.562, b=1.564, g=1.588, bire=0.0260, 2V(Calc)=34, 2V(Meas)=33.
 

Calculated Properties of Parafransoletite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.55 gm/cc
note: Specific Gravity of Parafransoletite =2.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEParafransoletite = 3.81 barns/electron
U=PEParafransoletite x rElectron Density= 9.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parafransoletite is Not Radioactive
 

Parafransoletite Classification
Help on Dana Class: Dana Class: 40.05.02.01 (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.02)Dana Group
 
40.05.02.01 Parafransoletite Ca3Be2(PO4)2(PO3,OH)2•4(H2O) P1 1
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 Parafransoletite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.77,p843-847,1992) OPTIC PROP.(Am.Min.,Vol.77,p843-847,1992)
Help on See Also: See Also: Links to other databases for Parafransoletite :
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
15 - WWW-MINCRYST

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Parafransoletite

Ca3Be2(PO4)2(PO3,OH)2•4(H2O)
Dana No: 40.05.02.01 Strunz No: 08.CA.05
Locality:

 

Notes: