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Glauberite Mineral Data

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General Glauberite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca(SO4)2
Help on Composition: Composition: Molecular Weight = 278.18 gm
   Sodium   16.53 %  Na   22.28 % Na2O
   Calcium  14.41 %  Ca   20.16 % CaO
   Sulfur   23.05 %  S    57.56 % SO3
   Oxygen   46.01 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca(SO4)2
Help on Environment: Environment: Dry salt-lake beds or marine evaporite deposits, generally in desert climates.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1808
Help on Locality: Locality: El Castellar mine, Villarrubia de Santiago, Castile-La Mancha, Spain Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Glauber's Salt, of alchemist origin which is named for Johann Rudolf Glauber (1604-1668), German alchemist.
Help on Name Pronunciation: Name Pronunciation: Glauberite + Pronunciation Say GLAUBERITE
Help on Synonym: Synonym: Glauber's Salt
  ICSD 26773
  PDF 19-1187

Glauberite Image

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Comments: Translucent crystals of glauberite.
Location: Superior, Pinal County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Hydroglauberite   Glauberite

Comments: Putty-colored chalky hydroglauberite on glauberite crystals.
Location: Camp Verde, Yavapai County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glauberite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2194:1:1.0273
Help on Cell Dimensions: Cell Dimensions: a = 10.129, b = 8.306, c = 8.533, Z = 4; beta = 112.183° V = 664.76 Den(Calc)= 2.78
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): 3.13(1), 2.66(0.8), 6.22(0.8),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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Physical Properties of Glauberite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless, Gray, Gray white, Yellow, Yellowish white.
Help on Density: Density: 2.7 - 2.85, Average = 2.77
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Glauberite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1888,KPDmeas= 0.1891,KC= 0.1865
Ncalc = 1.5 - 1.53
Help on Optical Data: Optical Data: Biaxial (-), a=1.507-1.515, b=1.527-1.535, g=1.529-1.536, bire=0.0210-0.0220, 2V(Calc)=24-34, 2V(Meas)=0-7. Dispersion strong, r > v.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.

Calculated Properties of Glauberite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.76 gm/cc
note: Specific Gravity of Glauberite =2.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0021443772
Boson Index = 0.9978556228
Help on Photoelectric: Photoelectric: PEGlauberite = 3.43 barns/electron
U=PEGlauberite x rElectron Density= 9.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Glauberite is Not Radioactive

Glauberite Classification

Help on  Dana Class: Dana Class: (28)Anhydrous Acid and Sulfates
  (28.04)with miscellaneous formulae
  (28.04.02)Dana Group Glauberite Na2Ca(SO4)2 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 07.AD.25 07 - SULFATES (SELENATES, TELLURATES)
  07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O
  07.AD -With only large cations
07.AD.25 Glauberite Na2Ca(SO4)2 C 2/c 2/m

Other Glauberite Information

Help on See Also: See Also: Links to other databases for Glauberite :
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 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineral and Gemstone Kingdom
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
18 - theimage

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Dana No: Strunz No: 07.AD.25





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