Mineralogy Database

Pirssonite Mineral Data

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General Pirssonite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca(CO3)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 242.11 gm
   Sodium    18.99 %  Na   25.60 % Na2O
   Calcium   16.55 %  Ca   23.16 % CaO
   Hydrogen   1.67 %  H    14.88 % H2O
   Carbon     9.92 %  C    36.36 % CO2
   Oxygen    52.87 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca(CO3)2•2(H2O)
Help on Environment: Environment: Continental evaporite deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1896
Help on Locality: Locality: Searles Lake, San Bernardino Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Louis Valentine Pirsson (1860-1919), American petrographer and mineralogist, Yale University, New Haven, Connecticut, USA.
Help on Name Pronunciation: Name Pronunciation: Pirssonite + Pronunciation Say PIRSSONITE
Help on Synonym: Synonym: ICSD 9012
  PDF 22-476
 

Pirssonite Image

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  Pirssonite

Comments: Almost transparent platy pirssonite crystal.
Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Pirssonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5643:1:0.2991
Help on Cell Dimensions: Cell Dimensions: a = 11.32, b = 20.06, c = 6, Z = 8; V = 1,362.48 Den(Calc)= 2.36
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F dd2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.51(1), 2.65(0.9), 2.57(0.8),
Help on Forms: Forms:

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

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

Help on Above

Forms: ( 0 1 0) ( 1 3 1) ( 1 1 1) ( 1 1 0)

Warning: this java applet does not work in some browsers because of security restrictions.

 

Physical Properties of Pirssonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Grayish, White.
Help on Density: Density: 2.35
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Fluorescent and Phosphorescent, Short UV=weak Blue-white to blue-gray.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Pirssonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2244,KPDmeas= 0.2254,KC= 0.2246
Ncalc = 1.53
Help on Optical Data: Optical Data: Biaxial (+), a=1.5043, b=1.5095, g=1.5751, bire=0.0708, 2V(Calc)=34, 2V(Meas)=31.433. Dispersion relatively weak.
 

Calculated Properties of Pirssonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.38 gm/cc
note: Specific Gravity of Pirssonite =2.36 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0015711671
Boson Index = 0.9984288329
Help on Photoelectric: Photoelectric: PEPirssonite = 2.48 barns/electron
U=PEPirssonite x rElectron Density= 5.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pirssonite is Not Radioactive
 

Pirssonite Classification

Help on  Dana Class: Dana Class: 15.02.01.01 (15)Hydrated Carbonates
  (15.02)where A+m B++n (XO3)p � x(H2O), (m+n):p > 1:1
  (15.02.01)Dana Group
 
15.02.01.01 Pirssonite Na2Ca(CO3)2•2(H2O) F dd2 mm2
Help on  Strunz Class: Strunz Class: 05.CB.30 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CB -With large cations (alkali and alkali-earth carbonates)
 
05.CB.30 Pirssonite Na2Ca(CO3)2•2(H2O) F dd2 mm2
 

Other Pirssonite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Pirssonite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

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Pirssonite

Na2Ca(CO3)2•2(H2O)
Dana No: 15.02.01.01 Strunz No: 05.CB.30
Locality:

 

Notes:

 

 
   
 


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