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Tschermigite Mineral Data

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General Tschermigite Information

Help on Chemical  Formula: Chemical Formula: (NH4)Al(SO4)2•12(H2O)
Help on Composition: Composition: Molecular Weight = 453.33 gm
   Aluminum   5.95 %  Al   11.25 % Al2O3
   Hydrogen   0.89 %  H      -   % Calc as (NH4)2O
   Hydrogen   5.34 %  H    47.69 % H2O
   Sulfur    14.15 %  S    35.32 % SO3
   Nitrogen   3.09 %  N     5.74 % (NH4)2O
   Oxygen    70.59 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)Al(SO4)2•12(H2O)
Help on Environment: Environment: Burning coal seams, mines, and dumps and bituminous shales. Found in fumaroles.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1853
Help on Locality: Locality: Cermniky, (Tschermig), Czechoslovakia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Tschermigite + Pronunciation Say TSCHERMIGITE
Help on Synonym: Synonym: Ammonia alum
  Deoderant Stone
  ICSD 100856
  PDF 22-Jul
 

Tschermigite Image

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  Tschermigite

Comments: Clear crystal of tschernichite in a vug.
Location: Goble, Colombia County, Oregon, USA. Scale: Not Given.
© Thomas Witzke / Abraxas-Verlag

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  Berndtite   Tschermigite

Comments: Yellow crystalline berndtite on tschermigite.
Location: Shamokin, Northumberland County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tschermigite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.215, Z = 4; V = 1,822.55 Den(Calc)= 1.65
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.327(1), 4.079(0.8), 3.273(0.75),
Help on Forms: Forms:

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

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I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 1) ( 1 0 0) ( 1 1 1)

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Physical Properties of Tschermigite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: White, Colorless.
Help on Density: Density: 1.65
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 Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Deliquescent - Crystals absorb water from the air and melt or otherwise deteriorate.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Tschermigite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.122 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.122 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2782,KPDmeas= 0.2782,KC= 0.2479
Ncalc = 1.41
Help on Optical Data: Optical Data: Isotropic, n=1.459.
 

Calculated Properties of Tschermigite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.75 gm/cc
note: Specific Gravity of Tschermigite =1.65 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PETschermigite = 1.16 barns/electron
U=PETschermigite x rElectron Density= 2.03 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tschermigite is Not Radioactive
 

Tschermigite Classification

Help on  Dana Class: Dana Class: 29.05.05.03 (29)Hydrated Acid and Sulfates
  (29.05)where A B (XO4)2 � x(H2O)
  (29.05.05)Alum Group
 
29.05.05.01 Alum-(K) KAl(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.02 Alum-(Na) NaAl(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.03 Tschermigite (NH4)Al(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.04 Lonecreekite (NH4)(Fe,Al)(SO4)2•12(H2O) P a3 2/m 3
 
29.05.05.05 Lanmuchangite! TlAl(SO4)2•12(H2O) P a3 2/m 3
Help on  Strunz Class: Strunz Class: 07.CC.20 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
 
07.CC.20 Lonecreekite (NH4)(Fe,Al)(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Alum-(K) KAl(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Alum-(Na) NaAl(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Lanmuchangite! TlAl(SO4)2•12(H2O) P a3 2/m 3
 
07.CC.20 Tschermigite (NH4)Al(SO4)2•12(H2O) P a3 2/m 3
 

Other Tschermigite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Tschermigite :
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

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Tschermigite

(NH4)Al(SO4)2•12(H2O)
Dana No: 29.05.05.03 Strunz No: 07.CC.20
Locality:

 

Notes:

 

 
   
 


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