Mineralogy Database

Paraumbite Mineral Data

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General Paraumbite Information

Help on Chemical  Formula: Chemical Formula: K3Zr2HSi6O18•n(H2O) n=3 to 7
Help on Composition: Composition: Molecular Weight = 811.30 gm
   Potassium  14.46 %  K    17.42 % K2O
   Zirconium  22.49 %  Zr   30.38 % ZrO2
   Silicon    20.77 %  Si   44.44 % SiO2
   Hydrogen    0.87 %  H     7.77 % H2O
   Oxygen     41.41 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3Zr2HSi6O18•3(H2O)
Help on Environment: Environment: Alkalic pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Mt. Eveslogchorr, eastern Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the close structural similarity to umbite.
Help on Name Pronunciation: Name Pronunciation: Paraumbite + Pronunciation Say PARAUMBITE

Paraumbite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.778:1:1.0948
Help on Cell Dimensions: Cell Dimensions: a = 10.34, b = 13.29, c = 14.55, Z = 4; V = 1,999.44 Den(Calc)= 2.69
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.95(1), 3.01(0.9), 6.46(0.8),

Physical Properties of Paraumbite

Help on Cleavage: Cleavage: {010} Perfect, {100} Good
Help on Color: Color: Colorless, White, Light yellow.
Help on Density: Density: 2.59
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Paraumbite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2229,KPDmeas= 0.2315,KC= 0.2171
Ncalc = 1.56 - 1.58
Help on Optical Data: Optical Data: Biaxial (-), a=1.588, b=1.601, g=1.61, bire=0.0220, 2V(Calc)=78, 2V(Meas)=82.

Calculated Properties of Paraumbite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.63 gm/cc
note: Specific Gravity of Paraumbite =2.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEParaumbite = 31.91 barns/electron
U=PEParaumbite x relectron= 83.78 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 203.66 (Gamma Ray American Petroleum Institute Units)
Concentration of Paraumbite per GRapi unit = 0.49 (%)

Estimated Radioactivity from Paraumbite - barely detectable


Paraumbite Classification

Help on  Dana Class: Dana Class: (59)Cyclosilicate Three-Membered Rings
  (59.02.01)Umbite and related species Umbite K2ZrSi3O9•(H2O) P 212121 2 2 2 Paraumbite K3Zr2HSi6O18•n(H2O)n=3to7 Unk Ortho Kostylevite K2ZrSi3O9•(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.DG.25 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DG -Inosilicates with 3-periodic single and multiple chains
09.DG.25 Paraumbite K3Zr2HSi6O18•n(H2O)n=3to7 Unk Ortho
09.DG.25 Umbite K2ZrSi3O9•(H2O) P 212121 2 2 2

Other Paraumbite Information

Help on References: References: NAME( Dana8) 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 Paraumbite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Print or Cut-and-Paste your Paraumbite Specimen Label here :


K3Zr2HSi6O18•n(H2O) n=3 to 7
Dana No: Strunz No: 09.DG.25





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