Tschermigite Mineral Data

Tschermigite Mineral Data +

[Express Minerals] [Minerals for Sale] [About Us] [En EspaÃƒï¿½Ã‚Â±ol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Tschermigite Information

Chemical Formula:

(NH4)Al(SO4)2·12(H2O)

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

Empirical Formula:

(NH₄)Al(SO₄)₂·12(H₂O)

Environment:

Burning coal seams, mines, and dumps and bituminous shales. Found in fumaroles.

IMA Status:

Valid Species (Pre-IMA) 1853

Locality:

Cermniky, (Tschermig), Czechoslovakia. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

Ammonia alum

Deoderant Stone

ICSD 100856

PDF 22-Jul

Tschermigite Image

Images:

Tschermigite

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

Images:

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

Cell Dimensions:

a = 12.215, Z = 4; V = 1,822.55 Den(Calc)= 1.65

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 4.327(1), 4.079(0.8), 3.273(0.75),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
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]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

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

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

Cleavage:

[100] Perfect

Color:

White, Colorless.

Density:

1.65

Diaphaniety:

Transparent to translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Deliquescent - Crystals absorb water from the air and melt or otherwise deteriorate.

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

None.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Tschermigite

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

Optical Data:

Isotropic, n=1.459.

Calculated Properties of Tschermigite

Electron Density:

r_electron=1.75 gm/cc
note: r_Tschermigite=1.65 gm/cc.

Fermion Index

Fermion Index = 0.03219
Boson Index = 0.96781

Photoelectric:

PE_Tschermigite= 1.16 barns/electron
U=PE_Tschermigite x r_electron= 2.03 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tschermigite is Not Radioactive

Tschermigite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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

Search for Tschermigite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Tschermigite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Tschermigite Mineral Data :

Ask about Tschermigite 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 Español

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

Tschermigite

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

Notes: