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Gainesite Mineral Data

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General Gainesite Information

Help on Chemical  Formula: Chemical Formula: Na2Zr2Be(PO4)4•1-2(H2O)
Help on Composition: Composition: Molecular Weight = 639.49 gm
   Cesium       2.08 %  Cs    2.20 % Cs2O
   Potassium    1.83 %  K     2.21 % K2O
   Sodium       5.75 %  Na    7.75 % Na2O
   Lithium      0.11 %  Li    0.23 % Li2O
   Calcium      0.63 %  Ca    0.88 % CaO
   Zirconium   24.25 %  Zr   32.76 % ZrO2
   Beryllium    0.85 %  Be    2.35 % BeO
   Iron         0.87 %  Fe    1.12 % FeO
   Phosphorus  19.37 %  P    44.39 % P2O5
   Hydrogen     0.47 %  H     4.23 % H2O
   Oxygen      43.78 %  O
              ______        ______ 
              100.00 %       98.12 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.6K0.3Cs0.1Be0.6Li0.1Zr1.7Fe2+0.1Ca0.1(PO4)4�1.5(H2O)
Help on Environment: Environment: Accessory mineral in a granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Nevel quarry, Newry, Oxford County, Maine, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Richard Venable Gaines (1917-1999), American mineralogist, economic geologist, and mineral collector of Earlysville, Virginia, USA, for his interest in beryllium minerals.
Help on Name Pronunciation: Name Pronunciation: Gainesite + Pronunciation Say GAINESITE
Help on Synonym: Synonym: ICSD 31199
  PDF 35-604

Gainesite Image

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Comments: Fragment of intensely blue colored gainesite on paper.
Location: Nevel Quarry (Twin Tunnels; United Feldspar Quarry), Newry, Oxford Co., Maine, USA. Scale: Fragment Size 0.2 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Gainesite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.60682
Help on Cell Dimensions: Cell Dimensions: a = 6.567, c = 17.119, Z = 2; V = 738.27 Den(Calc)= 2.88
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.068(1), 3.265(0.9), 3.023(0.5),

Physical Properties of Gainesite

Help on Color: Color: Blue.
Help on Density: Density: 2.94
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Gainesite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.079 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.101 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2167,KPDmeas= 0.2122,KC= 0.1967
Ncalc = 1.57 - 1.58
Help on Optical Data: Optical Data: Uniaxial (+), w=1.618, e=1.63, bire=0.0120.

Calculated Properties of Gainesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Gainesite =2.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEGainesite = 42.30 barns/electron
U=PEGainesite x relectron= 119.44 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 25.43 (Gamma Ray American Petroleum Institute Units)
Concentration of Gainesite per GRapi unit = 3.93 (%)

Estimated Radioactivity from Gainesite - barely detectable


Gainesite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.04)Gainesite Group Gainesite Na2Zr2Be(PO4)4•1-2(H2O) I 41/amd 4/m 2/m 2/m Mccrillisite NaCs(Be,Li)Zr2(PO4)4•1-2(H2O) I 41/amd 4/m 2/m 2/m Selwynite NaK(Be,Al)Zr2(PO4)4•2(H2O) I 41/amd 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CA.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CA -With small and large/medium cations
08.CA.20 Gainesite Na2Zr2Be(PO4)4•1-2(H2O) I 41/amd 4/m 2/m 2/m
08.CA.20 Mccrillisite NaCs(Be,Li)Zr2(PO4)4•1-2(H2O) I 41/amd 4/m 2/m 2/m
08.CA.20 Selwynite NaK(Be,Al)Zr2(PO4)4•2(H2O) I 41/amd 4/m 2/m 2/m

Other Gainesite 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 Gainesite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.CA.20





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