Tschermigite Mineral Data + Say TSCHERMIGITE


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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 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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Tschermigite   Berndtite

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 - DiploidalH-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),
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Forms: [ 0 1 1] [ 1 0 0] [ 1 1 1]

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Abdeen A M , Will G , Schafer W , Kirfel A , Bargouth M O , Recker K , Weiss A , Zeitschrift fur Kristallographie , 157 (1981) p.147-166, X-ray and neutron diffraction study of alums:, II. The crystal structure of methylammonium aluminium alum, III. The crystal structure of ammonium aluminium alum, Note: Neutron data

 

Physical Properties of Tschermigite

Help on Cleavage: Cleavage: [100] Perfect
Help on Color: Color: White, Colorless.
Help on Density: Density: 1.65
Help on Diaphaniety: Diaphaniety: 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: None.
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
Help on Optical Data: Optical Data: Isotropic, n=1.459.
 

Calculated Properties of Tschermigite

Help on Electron Density: Electron Density:

relectron=1.75 gm/cc
note: rTschermigite =1.65 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.03219
Boson Index = 0.96781
Help on Photoelectric: Photoelectric:

PETschermigite = 1.16 barns/electron
U=PETschermigite x relectron= 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: 29.5.5.3 (29)Hydrated Acid and Sulfates
  (29.5)where A B (XO4)2 · x(H2O)
  (29.5.5)Alum Group
 
29.5.5.1 Potassium-alum KAl(SO4)2·12(H2O) P a3 2/m 3
 
29.5.5.2 Sodium-alum NaAl(SO4)2·12(H2O) P a3 2/m 3
 
29.5.5.3 Tschermigite (NH4)Al(SO4)2·12(H2O) P a3 2/m 3
 
29.5.5.4 Lonecreekite (NH4)(Fe,Al)(SO4)2·12(H2O) P a3 2/m 3
 
29.5.5.5 Lanmuchangite! TlAl(SO4)2·12(H2O) P a3 2/m 3
Help on  Strunz Class: Strunz Class: VI/C.14-30 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium and very big size
  VI/C.14 - Sodium alum - Zincovoltaite series
 
VI/C.14-10 Sodium-alum NaAl(SO4)2·12(H2O) P a3 2/m 3
 
VI/C.14-20 Potassium-alum KAl(SO4)2·12(H2O) P a3 2/m 3
 
VI/C.14-30 Tschermigite (NH4)Al(SO4)2·12(H2O) P a3 2/m 3
 
VI/C.14-40 Lonecreekite (NH4)(Fe,Al)(SO4)2·12(H2O) P a3 2/m 3
 
VI/C.14-45 Lanmuchangite! TlAl(SO4)2·12(H2O) P a3 2/m 3
 
VI/C.14-50 Voltaite K2Fe5Fe3Al(SO4)12·18(H2O) F d3c 4/m 3 2/m
 
VI/C.14-60 Zincovoltaite K2Zn5Fe3Al(SO4)12·18(H2O) F d3c 4/m 3 2/m
 

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Tschermigite

(NH4)Al(SO4)2·12(H2O)
Dana No: 29.5.5.3 Strunz No: VI/C.14-30
Locality:

 

Notes:

 

 
   
 
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