Mineralogy Database

Northupite Mineral Data

Search Webmineral :

General Northupite Information

Help on Chemical  Formula: Chemical Formula: Na3Mg(CO3)2Cl
Help on Composition: Composition: Molecular Weight = 248.75 gm
   Sodium     27.73 %  Na   37.37 % Na2O
   Magnesium   9.77 %  Mg   16.20 % MgO
   Carbon      9.66 %  C    35.39 % CO2
   Chlorine   14.25 %  Cl   14.25 % Cl
                -   %   Cl   -3.22 % -O=Cl2   
   Oxygen     38.59 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3Mg(CO3)2Cl
Help on Environment: Environment: Continental evaporite deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1895
Help on Locality: Locality: Searles Lake, San Bernardino Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after C. H. Northup (b.1861), grocer, of San Jose, California, who found the first specimen.
Help on Name Pronunciation: Name Pronunciation: Northupite + Pronunciation Say NORTHUPITE
Help on Synonym: Synonym: ICSD 4237
  PDF 19-1213

Northupite Image

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


Comments: Single octahedron of Northupite.
Location: Searles Lake, San Bernardino County, California, USA. Scale: Grain size 8 mm.
© Dave Barthelmy

Northupite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 14.01, Z = 16; V = 2,749.88 Den(Calc)= 2.40
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: F d3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.48(1), 2.69(1), 8(0.8),

Physical Properties of Northupite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish, Colorless, Gray, Gray brown, Yellow.
Help on Density: Density: 2.38
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Fluorescent and Phosphorescent, Long UV=bright cream white.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white

Optical Properties of Northupite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2142,KPDmeas= 0.216,KC= 0.2231
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Isotropic, n=1.514.

Calculated Properties of Northupite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.33 gm/cc
note: Specific Gravity of Northupite =2.38 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENorthupite = 1.70 barns/electron
U=PENorthupite x rElectron Density= 3.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Northupite is Not Radioactive

Northupite Classification

Help on  Dana Class: Dana Class: 16a.03.09.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.03)where (A B)2 (XO3) Zq
  (16a.03.09)Dana Group
16a.03.09.01 Northupite Na3Mg(CO3)2Cl F d3 2/m 3
Help on  Strunz Class: Strunz Class: 05.BF.05 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BF -With (Cl), SO4, PO4, TeO3
05.BF.05 Ferrotychite Na6Fe2(SO4)(CO3)4 F d3 2/m 3
05.BF.05 Manganotychite Na6(Mn,Fe,Mg)2(SO4)(CO3)4 F d3 2/m 3
05.BF.05 Northupite Na3Mg(CO3)2Cl F d3 2/m 3
05.BF.05 Tychite Na6Mg2(CO3)4(SO4) F d3 2/m 3

Other Northupite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Northupite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Northupite using:

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

Visit our Advertisers for Northupite :

Ask about Northupite 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 Espaņol

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


Dana No: 16a.03.09.01 Strunz No: 05.BF.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.