Mineralogy Database

Ulexite Mineral Data

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General Ulexite Information

Help on Chemical  Formula: Chemical Formula: NaCaB5O6(OH)6•5(H2O)
Help on Composition: Composition: Molecular Weight = 405.23 gm
   Sodium     5.67 %  Na    7.65 % Na2O
   Calcium    9.89 %  Ca   13.84 % CaO
   Boron     13.34 %  B    42.95 % B2O3
   Hydrogen   3.98 %  H    35.57 % H2O
   Oxygen    67.12 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCaB5O6(OH)6•5(H2O)
Help on Environment: Environment: Secondary borate mineral probably derived from alteration of borax under mild heat, pressure and addition of Ca.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1850
Help on Locality: Locality: Iquique, Tarapac�, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the German chemist, George Ludwig Ulex (1811-1883).
Help on Name Pronunciation: Name Pronunciation: Ulexite Say ULEXITE
Help on Synonym: Synonym: ICSD 100565
  PDF 12-419

Ulexite Image

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Comments: Tray of fibrous Ulexite fragments which have been cut and polished perpendicular to the fibers. This shows the fiber-optic "TV stone" effect which transmit images through the fragments.
Location: U.S. Borax Mine, Boron, Kramer District, Kern County, California, USA. Scale: Picture size 10 cm.
© Dave Barthelmy

Ulexite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6849:1:0.5192
Help on Cell Dimensions: Cell Dimensions: a = 8.809, b = 12.86, c = 6.678, Z = 2; alpha = 90.25°, beta = 109.1°, gamma = 105.1° V = 690.17 Den(Calc)= 1.95
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): 12.2(1), 7.75(0.8), 6(0.3),

Physical Properties of Ulexite

Help on Cleavage: Cleavage: {010} Perfect, {110} Perfect
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.95 - 1.96, Average = 1.95
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Capillary - Very slender and long, like a thread or hair (e.g. millerite).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent and some Phosphorescence, Short UV=weak yellow-white, Long UV=weak yellow-white.
Help on Luster: Luster: Chatoyant
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white

Optical Properties of Ulexite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2585,KPDmeas= 0.2592,KC= 0.2569
Ncalc = 1.5
Help on Optical Data: Optical Data: Biaxial (+), a=1.49, b=1.51, g=1.52, bire=0.0300, 2V(Calc)=68, 2V(Meas)=73-78. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.

Calculated Properties of Ulexite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.01 gm/cc
note: Specific Gravity of Ulexite =1.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEUlexite = 1.54 barns/electron
U=PEUlexite x rElectron Density= 3.09 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ulexite is Not Radioactive

Ulexite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.11)Dana Group Ulexite NaCaB5O6(OH)6•5(H2O) P1 1
Help on  Strunz Class: Strunz Class: 06.EA.25 06 - BORATES
  06.E - Pentaborates
  06.EA -Neso-pentaborates
06.EA.25 Ulexite NaCaB5O6(OH)6•5(H2O) P1 1

Other Ulexite Information

Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Sinkankas66)
Help on See Also: See Also: Links to other databases for Ulexite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Glendale Community College
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineral and Gemstone Kingdom
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 06.EA.25





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