Changoite Mineral Data

Changoite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About


General Changoite Information

Help on Chemical Formula: Chemical Formula: Na2Zn(SO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 375.56 gm
   Sodium    12.24 %  Na   16.50 % Na2O
   Zinc      17.41 %  Zn   21.67 % ZnO
   Hydrogen   2.15 %  H    19.19 % H2O
   Sulfur    17.08 %  S    42.64 % SO3
   Oxygen    51.12 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Zn(SO4)2•4(H2O)
Help on Environment: Environment: Found as a product of oxidation in an old mining area. The zinc-dominant analogue of blödite and nickelblödite.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: 2 km west of Sierra Gorda, northeast of Antofagasta, northern Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the changos, the early former inhabitants of northern Chile.
Help on Synonym: Synonym: IMA1997-041
 

Search for Changoite Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

Changoite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.3428:1:0.6706
Help on Cell Dimensions: Cell Dimensions: a = 11.077, b = 8.249, c = 5.532, Z = 2; beta = 100.183° V = 497.52 Den(Calc)= 2.51
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.289(1), 4.55(0.58), 3.262(0.35),
Click Here for Large Changoite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Giglio M , Acta Crystallographica , 11 (1958) p.789-794, Die kristallstruktur von Na2Zn(SO4)2*4H2O (Zn-blodit), Locality: synthetic

 

Physical Properties of Changoite

Help on Color: Color: Colorless.
Help on Density: Density: 2.5
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Water Soluble - Water soluble mineral.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Changoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.204,KPDmeas= 0.2048,KC= 0.2063
Ncalc = 1.52
Help on Optical Data: Optical Data: Biaxial (-), a=1.507, b=1.512, g=1.517, bire=0.0100
 

Calculated Properties of Changoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Changoite =2.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0086680282
Boson Index = 0.9913319718
Help on Photoelectric: Photoelectric: PEChangoite = 9.60 barns/electron
U=PEChangoite x rElectron Density= 24.03 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Changoite is Not Radioactive
 

Changoite Classification
Help on Dana Class: Dana Class: 29.03.03.05 (29)Hydrated Acid and Sulfates
  (29.03)where (A+)2 B (XO4)2 ˇ x(H2O)
  (29.03.03)Blodite Group
 
29.03.03.01 Blodite Na2Mg(SO4)2•4(H2O) P 21/a 2/m
 
29.03.03.02 Nickelblodite Na2(Ni,Mg)(SO4)2•4(H2O) P 21/a 2/m
 
29.03.03.03 Leonite K2Mg(SO4)2•4(H2O) C 2/m 2/m
 
29.03.03.04 Mereiterite! K2Fe(SO4)2•4(H2O) C 2/m 2/m
 
29.03.03.05 Changoite! Na2Zn(SO4)2•4(H2O) P 21/a 2/m
Help on Strunz Class: Strunz Class: 07.CC.50 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
 
07.CC.50 Blodite Na2Mg(SO4)2•4(H2O) P 21/a 2/m
 
07.CC.50 Changoite! Na2Zn(SO4)2•4(H2O) P 21/a 2/m
 
07.CC.50 Nickelblodite Na2(Ni,Mg)(SO4)2•4(H2O) P 21/a 2/m
 

Other Changoite Information
Help on References: References: NAME( CanMin 8/1999) PHYS. PROP.(AmMin, V84, p. 1685) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Changoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Changoite using:

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

Visit our Advertisers for Changoite :

A Bijoux Google Search for Changoite
Adam's Minerals Google Search for Changoite
Cape Minerals Google Search for Changoite
Dakota Matrix Minerals Google Search for Changoite
Excalibur Mineral Corp. Google Search for Changoite
Exceptional Minerals Google Search for Changoite
John Betts Fine Minerals Search for Changoite
McDougall Minerals Google Search for Changoite
Mineral News Website Link
Rock and Mineral Shows Google Search for Changoite
Weinrich Minerals, Inc. Google Search for Changoite

Ask about Changoite 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 Espańol

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

Changoite

Na2Zn(SO4)2•4(H2O)
Dana No: 29.03.03.05 Strunz No: 07.CC.50
Locality:

 

Notes: