Mineralogy Database

Gaylussite Mineral Data

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General Gaylussite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca(CO3)2•5(H2O)
Help on Composition: Composition: Molecular Weight = 296.15 gm
   Sodium    15.53 %  Na   20.93 % Na2O
   Calcium   13.53 %  Ca   18.94 % CaO
   Hydrogen   3.40 %  H    30.42 % H2O
   Carbon     8.11 %  C    29.72 % CO2
   Oxygen    59.43 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaNa2(CO3)2•5(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1826
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French chemist and physicist, J. L. Gay-Lussac (1778-1850).
Help on Name Pronunciation: Name Pronunciation: Gaylussite + Pronunciation Say GAYLUSSITE
Help on Synonym: Synonym: Gay Lussite

Gaylussite Image

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Comments: Clear, nearly colorless crystals of gaylussite.
Location: Trona, Searles Lake, San Bernardino County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gaylussite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4897:1:1.4406
Help on Cell Dimensions: Cell Dimensions: a = 11.589, b = 7.779, c = 11.207, Z = 4; beta = 102° V = 988.24 Den(Calc)= 1.99
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.205(1), 6.407(0.57), 2.635(0.54),
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: ( 0 0 1) ( 0 1 1) ( 1 1 2) ( 0 1 1) ( 1 1 0) ( 1 1 0)

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Physical Properties of Gaylussite

Help on Cleavage: Cleavage: {110} Perfect, {001} Indistinct
Help on Color: Color: Colorless, Gray, Gray white, Yellow, Yellowish white.
Help on Density: Density: 1.93 - 1.99, Average = 1.96
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Long UV=blue-white.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Gaylussite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2483,KPDmeas= 0.2521,KC= 0.2457
Ncalc = 1.47 - 1.49
Help on Optical Data: Optical Data: Biaxial (-), a=1.444, b=1.5155, g=1.523, bire=0.0790, 2V(Calc)=34, 2V(Meas)=34. Dispersion relatively strong.

Calculated Properties of Gaylussite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.04 gm/cc
note: Specific Gravity of Gaylussite =1.99 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013652975
Boson Index = 0.9986347025
Help on Photoelectric: Photoelectric: PEGaylussite = 2.06 barns/electron
U=PEGaylussite x rElectron Density= 4.21 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gaylussite is Not Radioactive

Gaylussite Classification

Help on  Dana Class: Dana Class: (15)Hydrated Carbonates
  (15.02)where A+m B++n (XO3)p � x(H2O), (m+n):p > 1:1
  (15.02.02)Dana Group Gaylussite Na2Ca(CO3)2•5(H2O) I2/a 2/m
Help on  Strunz Class: Strunz Class: 05.CB.35 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CB -With large cations (alkali and alkali-earth carbonates)
05.CB.35 Gaylussite Na2Ca(CO3)2•5(H2O) I2/a 2/m

Other Gaylussite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Gaylussite :
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 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 05.CB.35





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