Mineralogy Database

Nahpoite Mineral Data

Search Webmineral :

General Nahpoite Information

Help on Chemical  Formula: Chemical Formula: Na2HPO4
Help on Composition: Composition: Molecular Weight = 141.96 gm
   Sodium      32.39 %  Na   43.66 % Na2O
   Phosphorus  21.82 %  P    49.99 % P2O5
   Hydrogen     0.71 %  H     6.35 % H2O
   Oxygen      45.08 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2(HPO4)
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Big Fish River in northern Richarson Mountains, Yukon Territory, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (NaHPO-).
Help on Name Pronunciation: Name Pronunciation: Nahpoite Say NAHPOITE
Help on Synonym: Synonym: ICSD 37142
  PDF 35-735

Nahpoite Image

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


Comments: Nearly opaque white powdery nahpoite.
Location: Big Fish River, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Nahpoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7997:1:0.7967
Help on Cell Dimensions: Cell Dimensions: a = 5.47, b = 6.84, c = 5.45, Z = 2; beta = 116.33° V = 182.76 Den(Calc)= 2.58
Help on Crystal System: Crystal System: Monoclinic Space Group: P 21/m,P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.803(1), 2.72(0.7), 3.84(0.55),

Physical Properties of Nahpoite

Help on Color: Color: White.
Help on Density: Density: 2.58
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white

Optical Properties of Nahpoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1928,KPDmeas= 0.1928,KC= 0.196
Ncalc = 1.51
Help on Optical Data: Optical Data: Biaxial (?), a=1.49, g=1.505, bire=0.0150

Calculated Properties of Nahpoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.54 gm/cc
note: Specific Gravity of Nahpoite =2.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002174577
Boson Index = 0.9997825423
Help on Photoelectric: Photoelectric: PENahpoite = 1.56 barns/electron
U=PENahpoite x rElectron Density= 3.98 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nahpoite is Not Radioactive

Nahpoite Classification

Help on  Dana Class: Dana Class: (37)Anhydrous Acid Phosphates, etc
  (37.01)with miscellaneous formulae
  (37.01.05)Dana Group Nahpoite Na2HPO4 P 21/m,P 21 Mono
Help on  Strunz Class: Strunz Class: 08.AD.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
08.AD.05 Nahpoite Na2HPO4 P 21/m,P 21 Mono

Other Nahpoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Nahpoite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

Search for Nahpoite using:

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

Visit our Advertisers for Nahpoite :

Ask about Nahpoite 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 Nahpoite Specimen Label here :


Dana No: Strunz No: 08.AD.05





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