Mineralogy Database

Lasalite Mineral Data

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General Lasalite Information

Help on Chemical  Formula: Chemical Formula: Na2Mg2(V10O28)•20H2O
Help on Composition: Composition: Molecular Weight = 1,404.31 gm
   Potassium   0.39 %  K     0.47 % K2O
   Sodium      3.01 %  Na    4.06 % Na2O
   Calcium     1.26 %  Ca    1.76 % CaO
   Magnesium   3.27 %  Mg    5.42 % MgO
   Vanadium   34.64 %  V    61.84 % V2O5
   Hydrogen    2.67 %  H    23.87 % H2O
   Sulfur      1.03 %  S     2.57 % SO3
   Oxygen     53.73 %  O
             ______        ______ 
             100.00 %       99.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.84Ca0.44K0.14Mg1.89V5+9.55S0.45O28.55(H2O)18.61
Help on Environment: Environment: Secondary mineral that form from the oxidation of vanadium orebodies in sedimentary rocks.
Help on IMA Status: IMA Status: Approved IMA 2007 (Dana # Added)
Help on Locality: Locality: Vanadium Queen mine, 18 km east of La Sal, San Juan County, Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Synonym: Synonym: IMA2007-005

Lasalite Image

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Comments: Bright orange efflorescent lasalite crust on sandstone.
Location: Vanadium Queen mine, San Juan Co., Utah, USA. Scale: Picture Size 2 x 2 cm.
© Tom Loomis / Dakota Matrix

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Comments: Lasalite crystals on sandstone surface. (CanMin, v46:1365).
Location: Vanadium Queen mine, 18 km east of La Sal, San Juan County, Utah, USA. Scale: Picture size 3 mm.
© Joe Marty/Canadian Mineralogist

Lasalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.173:1:1.5501
Help on Cell Dimensions: Cell Dimensions: a = 23.9019, b = 10.9993, c = 17.0504, Z = 4; beta = 118.284° V = 3,947.44 Den(Calc)= 2.36
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.72(1), 6.67(0.8), 7.42(0.7),8.19(0.6), 9.09(0.6), 1.861(0.5), 2.706(0.5), 2.882(0.5),

Physical Properties of Lasalite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Yellow orange.
Help on Density: Density: 2.38
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 1 - Talc
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow

Optical Properties of Lasalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3243,KPDmeas= 0.3216,KC= 0.3192
Ncalc = 1.75 - 1.76
Help on Optical Data: Optical Data: Biaxial (-), a=1.743, b=1.773, g=1.78, bire=0.0370

Calculated Properties of Lasalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.36 gm/cc
note: Specific Gravity of Lasalite =2.38 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0044935548
Boson Index = 0.9955064452
Help on Photoelectric: Photoelectric: PELasalite = 6.89 barns/electron
U=PELasalite x relectron= 16.26 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 5.57 (Gamma Ray American Petroleum Institute Units)
Concentration of Lasalite per GRapi unit = 17.96 (%)

Estimated Radioactivity from Lasalite - barely detectable


Lasalite Classification

Help on  Dana Class: Dana Class: (47)Vanadium Oxysalts
  (47.02.07)Dana Group Lasalite! Na2Mg2(V10O28)•20H2O C 2/c 2/m
Help on  Strunz Class: Strunz Class: 04.HC.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.H - V[5,6] Vanadates
  04.HC -[6]-Sorovanadates
04.HC.05 Pascoite Ca3V10O28•17(H2O) C 2/m 2/m
04.HC.05 Magnesiopascoite! Ca2Mg[V10O28]•16H2O C 2/m 2/m
04.HC.05 Lasalite! Na2Mg2(V10O28)•20H2O C 2/c 2/m

Other Lasalite Information

Help on References: References: NAME( CanMin, v46:1365) PHYS. PROP.(CanMin, v46:1365) OPTIC PROP.(CanMin, v46:1365)
Help on See Also: See Also: Links to other databases for Lasalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 04.HC.05





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