Mineralogy Database

Ussingite Mineral Data

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General Ussingite Information

Help on Chemical  Formula: Chemical Formula: Na2AlSi3O8(OH)
Help on Composition: Composition: Molecular Weight = 302.22 gm
   Sodium    15.21 %  Na   20.51 % Na2O
   Aluminum   8.93 %  Al   16.87 % Al2O3
   Silicon   27.88 %  Si   59.64 % SiO2
   Hydrogen   0.33 %  H     2.98 % H2O
   Oxygen    47.65 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2AlSi3O8(OH)
Help on Environment: Environment: Syenite pegmatites. Distinguished from sodalite by lack of fluorescence.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1915
Help on Locality: Locality: Kangerdluarusuk, Ilimaussaq, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Niels Viggo Ussing (1864-1911), Copenhagen, Denmark.
Help on Name Pronunciation: Name Pronunciation: Ussingite + Pronunciation Say USSINGITE
Help on Synonym: Synonym: ICSD 6265
  PDF 28.1037

Ussingite Image

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  Cuprostibite   Ussingite

Comments: Massive ussingite hosting grains of the very rare copper antimony-thallium bearing cuprostibite.
Location: Ilimaussaq, Tasseq, Greenland. Scale: 4.8 x3.4 cm.
© John Veevaert

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  Ussingite   Vuonnemite

Comments: Massive, violet colored ussingite with a single bladed partial crystal of white vuonnemite 1.5 cm in length.
Location: Mt. Karnasurf, Lovozero, Russia. Scale: 4.2 x 3 cm.
© John Veevaert

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  Gerasimovskite   Ussingite

Comments: Pale tan gerasimovskite pseudomorphous after epistolite crystal, in purple ussingite.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ussingite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.944:1:1.1297
Help on Cell Dimensions: Cell Dimensions: a = 7.256, b = 7.686, c = 8.683, Z = 2; alpha = 90.75°, beta = 99.75°, gamma = 122.48° V = 402.57 Den(Calc)= 2.49
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.993(1), 6.502(0.69), 4.245(0.54),

Physical Properties of Ussingite

Help on Cleavage: Cleavage: {001} Perfect, {110} Perfect
Help on Color: Color: White, Light violet red, Dark violet red, Pink, Reddish violet.
Help on Density: Density: 2.46 - 2.5, Average = 2.48
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Ussingite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2067,KPDmeas= 0.2092,KC= 0.2081
Ncalc = 1.51 - 1.52
Help on Optical Data: Optical Data: Biaxial (+), a=1.504, b=1.508-1.509, g=1.543-1.545, bire=0.0390-0.0410, 2V(Calc)=40-42, 2V(Meas)=32-39.
Help on Pleochroism (x): Pleochroism (x): pleochroic.
Help on Pleochroism (y): Pleochroism (y): pleochroic.
Help on Pleochroism (z): Pleochroism (z): pleochroic.

Calculated Properties of Ussingite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.46 gm/cc
note: Specific Gravity of Ussingite =2.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEUssingite = 1.58 barns/electron
U=PEUssingite x rElectron Density= 3.88 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ussingite is Not Radioactive

Ussingite Classification

Help on  Dana Class: Dana Class: (76)Tectosilicate Al-Si Framework
  (76.03)with other Be/Al/Si frameworks
  (76.03.03)Dana Group Ussingite Na2AlSi3O8(OH) P1 1
Help on  Strunz Class: Strunz Class: 09.EH.20 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EH -Transitional structures between phyllosilicate and other silicate units
09.EH.20 Ussingite Na2AlSi3O8(OH) P1 1

Other Ussingite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ussingite :
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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Dana No: Strunz No: 09.EH.20





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