Mineralogy Database

Nahcolite Mineral Data

Search Webmineral :

General Nahcolite Information

Help on Chemical  Formula: Chemical Formula: NaHCO3
Help on Composition: Composition: Molecular Weight = 84.01 gm
   Sodium    27.37 %  Na   36.89 % Na2O
   Hydrogen   1.20 %  H    10.72 % H2O
   Carbon    14.30 %  C    52.39 % CO2
   Oxygen    57.14 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na(HCO3)
Help on Environment: Environment: Continental evaporite deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1929
Help on Locality: Locality: Searles Lake, San Bernardino County, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the nmonic of the chemical formula (NaHCO).
Help on Name Pronunciation: Name Pronunciation: Nahcolite + Pronunciation Say NAHCOLITE
Help on Synonym: Synonym: Baking soda
  ICSD 18183
  PDF 15-700
  Sodium bicarbonate

Nahcolite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Massive, translucent nahcolite.
Location: Anvil Point, Rifle, Garfield County, Colorado, USA. Scale: 2.1 x 1.4 cm.
© John Veevaert

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Trona   Nahcolite

Comments: Massive, coarse-grained Trona from a drill core of the upper mixed-layer Saltbed. White areas are nahcolite alteration.
Location: Searles Lake, San Bernardino County, California, USA. Scale: 12 x 15 cm.
© Dave Barthelmy

Nahcolite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7717:1:0.3593
Help on Cell Dimensions: Cell Dimensions: a = 7.475, b = 9.686, c = 3.481, Z = 4; beta = 93.38° V = 251.60 Den(Calc)= 2.22
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.97(1), 2.6(0.9), 3.08(0.25),
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 0) ( 1 1 0) ( 1 1 1) ( 0 1 0) ( 1 0 1)

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


Physical Properties of Nahcolite

Help on Cleavage: Cleavage: {101} Perfect, {111} Good, {100} Distinct
Help on Color: Color: Colorless, White, Gray, Brown, Black.
Help on Density: Density: 2.21
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=blue-white cream-yellow, Long UV=cream-yellow.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white

Optical Properties of Nahcolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2197,KPDmeas= 0.2207,KC= 0.2171
Ncalc = 1.48
Help on Optical Data: Optical Data: Biaxial (-), a=1.377, b=1.503, g=1.583, bire=0.2060
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.

Calculated Properties of Nahcolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Nahcolite =2.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0018487923
Boson Index = 0.9981512077
Help on Photoelectric: Photoelectric: PENahcolite = 0.64 barns/electron
U=PENahcolite x rElectron Density= 1.43 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nahcolite is Not Radioactive

Nahcolite Classification

Help on  Dana Class: Dana Class: (13)Acid Carbonates
  (13.01)with miscellaneous formulae
  (13.01.01)Dana Group Nahcolite NaHCO3 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 05.AA.15 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AA -Alkali Carbonates
05.AA.15 Nahcolite NaHCO3 P 21/n 2/m

Other Nahcolite Information

Help on See Also: See Also: Links to other databases for Nahcolite :
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

Search for Nahcolite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Nahcolite :

Ask about Nahcolite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa´┐Żol

Print or Cut-and-Paste your Nahcolite Specimen Label here :


Dana No: Strunz No: 05.AA.15





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.