Tschermigite Mineral Data

[Newest Minerals] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa, PayPal, and Mastercard are Welcomed

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.

Name Pronunciation:

Tschermigite + Pronunciation

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

Diaphaneity:

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:

Non-fluorescent.

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
Ncalc = 1.41

Optical Data:

Isotropic, n=1.459.

Calculated Properties of Tschermigite

Electron Density:

Bulk Density (Electron Density)=1.75 gm/cc
note: Specific Gravity of Tschermigite =1.65 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Tschermigite= 1.16 barns/electron
U=PE_Tschermigite x rElectron Density= 2.03 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tschermigite is Not Radioactive

Tschermigite Classification

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

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

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 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Tschermigite using:

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

Visit our Advertisers for Tschermigite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

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: 29.05.05.03 Strunz No: 07.CC.20
Locality:

Notes: