Sodium-alum Mineral Data

Sodium-alum Mineral Data

General Sodium-alum Information

Chemical Formula:

NaAl(SO4)2·12(H2O)

Composition:

Molecular Weight = 458.28 gm

Sodium 5.02 % Na 6.76 % Na₂O

Aluminum 5.89 % Al 11.12 % Al₂O₃

Hydrogen 5.28 % H 47.17 % H₂O

Sulfur 13.99 % S 34.94 % SO₃

Oxygen 69.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaAl(SO₄)₂·12(H₂O)

IMA Status:

Valid Species (Pre-IMA)

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 15368

PDF 29-1167

Search for Sodium-alum Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Sodium-alum Crystallography

Cell Dimensions:

a = 12.214, Z = 4; V = 1,822.11 Den(Calc)= 1.67

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): 4.314(1), 2.962(0.35), 3.526(0.14),

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.

Physical Properties of Sodium-alum

Color:

Colorless.

Density:

1.73

Diaphaniety:

Transparent

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

3 - Calcite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Optical Properties of Sodium-alum

Gladstone-Dale:

CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2661,KPDmeas= 0.2569,KC= 0.2581

Optical Data:

Isotropic, n=1.4388.

Calculated Properties of Sodium-alum

Electron Density:

r_electron=1.81 gm/cc
note: r_Sodium-alum=1.73 gm/cc.

Fermion Index

Fermion Index = 0.00139
Boson Index = 0.99861

Photoelectric:

PE_Sodium-alum= 1.22 barns/electron
U=PE_Sodium-alum x r_electron= 2.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Sodium-alum is Not Radioactive

Sodium-alum Classification

Dana Class:

29.5.5.2 (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.14-10 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 Sodium-alum Information

References:

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

See Also:

Links to other databases for Sodium-alum :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

Search for Sodium-alum using:

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

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

Translate Sodium-alum Mineral Data :

Ask about Sodium-alum 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 Sodium-alum Specimen Label here :

Sodium-alum

NaAl(SO4)2·12(H2O)
Dana No: 29.5.5.2 Strunz No: VI/C.14-10
Locality:

Notes: