Mineralogy Database

Ungemachite Mineral Data

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General Ungemachite Information

Help on Chemical  Formula: Chemical Formula: K3Na8Fe+++(SO4)6(NO3)2•6(H2O)
Help on Composition: Composition: Molecular Weight = 1,165.54 gm
   Potassium  10.06 %  K    12.12 % K2O
   Sodium     15.78 %  Na   21.27 % Na2O
   Iron        4.79 %  Fe    6.85 % Fe2O3
   Hydrogen    1.04 %  H     9.27 % H2O
   Sulfur     16.51 %  S    41.22 % SO3
   Nitrogen    2.40 %  N     9.27 % N2O5
   Oxygen     49.42 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3Na8Fe3+(SO4)6(NO3)2•6(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1936
Help on Locality: Locality: Chuquicamata, Antofagasta, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Henri-Leon Ungemach (1879-1936), French mineralogist and crystallographer. Secretary of the French Society of Mineralogy from 1919 to 1934.
Help on Name Pronunciation: Name Pronunciation: Ungemachite + Pronunciation Say UNGEMACHITE
Help on Synonym: Synonym: ICSD 201917
  PDF 20-1326
 

Ungemachite Image

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  Ungemachite   Metasideronatrite

Comments: Translucent rounded ungemachite microcrystal on yellow metasideronatrite.
Location: Chuquicamata, Antofagasta, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ungemachite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.29298
Help on Cell Dimensions: Cell Dimensions: a = 10.898, c = 24.989, Z = 3; V = 2,570.24 Den(Calc)= 2.26
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.43(1), 8.33(0.6), 2.72(0.5),
Help on Forms: Forms:

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RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

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I - Indicies
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F - Fit to Screen
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Help on Above

Forms: ( 1 1 5) ( 0 1 4) ( 0 1 7) ( 1 1 2) ( 0 2 5) ( 0 1 1) ( 2 2 7) ( 0 0 1)

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Physical Properties of Ungemachite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, Light yellow.
Help on Density: Density: 2.287
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Ungemachite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2104,KPDmeas= 0.2079,KC= 0.2127
Ncalc = 1.48 - 1.49
Help on Optical Data: Optical Data: Uniaxial (+), w=1.449, e=1.502, bire=0.0530.
 

Calculated Properties of Ungemachite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.25 gm/cc
note: Specific Gravity of Ungemachite =2.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEUngemachite = 3.71 barns/electron
U=PEUngemachite x relectron= 8.35 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 144.75 (Gamma Ray American Petroleum Institute Units)
Concentration of Ungemachite per GRapi unit = 0.69 (%)

Estimated Radioactivity from Ungemachite - barely detectable

 

Ungemachite Classification

Help on  Dana Class: Dana Class: 32.02.03.01 (32)Compound Sulfates
  (32.02)(hydrous) with simple bi-anionic formula
  (32.02.03)Dana Group
 
32.02.03.01 Ungemachite K3Na8Fe(SO4)6(NO3)2•6(H2O) R 3 3
Help on  Strunz Class: Strunz Class: 07.DG.10 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DG -With large and medium sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
 
07.DG.10 Clinoungemachite K3Na9Fe(SO4)6(OH)3•9(H2O)? (pseudo-HEX-R) Mono
 
07.DG.10 Humberstonite K3Na7Mg2(SO4)6(NO3)2•6(H2O) R 3 3
 
07.DG.10 Ungemachite K3Na8Fe(SO4)6(NO3)2•6(H2O) R 3 3
 

Other Ungemachite 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 Ungemachite :
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
15 - WWW-MINCRYST

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

Ungemachite

K3Na8Fe+++(SO4)6(NO3)2•6(H2O)
Dana No: 32.02.03.01 Strunz No: 07.DG.10
Locality:

 

Notes:

 

 
   
 


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