Nordstrandite Mineral Data

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General Nordstrandite Information

Chemical Formula:

Al(OH)3

Composition:

Molecular Weight = 78.00 gm

Aluminum 34.59 % Al 65.36 % Al₂O₃

Hydrogen 3.88 % H 34.64 % H₂O

Oxygen 61.53 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al(OH)₃

Environment:

Weathering product of bauxitic soils derived from limestone. Vein or fissure-filling material in dolomitic oil shale. Alteration product of aluminum carbonate minerals. Late-stage m ineral in nepheline syenite pegmatites

IMA Status:

Approved IMA 1958

Locality:

Gunony Kapor, near Bau, Sarawak, Malaysia. Link to MinDat.org Location Data.

Name Origin:

Named for R. A. van Nordstrand (1817-), Sinclair Research Laboratories, who first synthesized the compound.

Name Pronunciation:

Nordstrandite + Pronunciation

Synonym:

ICSD 24466

PDF 24-6

Nordstrandite Image

Images:

Nordstrandite

Comments: Large pale brownish crystals of nordstrandite.
Location: Bärenstein Quarry, Niederschlag, Oberwiesenthal, Erzgebirge, Saxony, Germany. Scale: Picture size 35 mm.
© Thomas Witzke / Abraxas-Verlag

Nordstrandite Crystallography

Axial Ratios:

a:b:c =0.8863:1:0.7315

Cell Dimensions:

a = 6.148, b = 6.936, c = 5.074, Z = 4; alpha = 95.76°, beta = 99.06°, gamma = 83.3° V = 211.14 Den(Calc)= 2.45

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 4.78(1), 2.26(0.4), 2.39(0.4),

Crystal Structure:

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Bosmans H J , Acta Crystallographica, Section B , 26 (1970) p.649-652, Unit cell and crystal structure of nordstrandite, Al(OH)3, Locality: synthetic

View Additional jPOWD Structure files for Nordstrandite
[1]

Physical Properties of Nordstrandite

Cleavage:

{110} Perfect

Color:

Beige, Colorless, Light brown, Light green, Pink.

Density:

2.42

Diaphaneity:

Transparent

Hardness:

3 - Calcite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Nordstrandite

Gladstone-Dale:

CI meas= 0.039 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.051 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2401,KPDmeas= 0.2431,KC= 0.2531
Ncalc = 1.61 - 1.62

Optical Data:

Biaxial (+), a=1.58, b=1.583, g=1.602, bire=0.0220, 2V(Calc)=44, 2V(Meas)=24. Dispersion r < v moderate.

Calculated Properties of Nordstrandite

Electron Density:

Bulk Density (Electron Density)=2.48 gm/cc
note: Specific Gravity of Nordstrandite =2.42 gm/cc.

Fermion Index:

Fermion Index = 0.0003011748
Boson Index = 0.9996988252

Photoelectric:

PE_{Nordstrandite}= 1.10 barns/electron
U=PE_{Nordstrandite} x rElectron Density= 2.73 barns/cc.

Radioactivity:

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

Nordstrandite Classification

Dana Class:

06.03.03.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.03)with (OH)3 or (OH)6 groups

(06.03.03)Dana Group

06.03.03.01 Nordstrandite Al(OH)3 P1 1

Strunz Class:

04.FE.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FE -Hydroxides with OH, without H2O; sheets of edge-sharing octahedra

04.FE.10 Bayerite Al(OH)3 P 2₁/a 2/m

04.FE.10 Doyleite Al(OH)3 P1 1

04.FE.10 Gibbsite Al(OH)3 P 2₁/n 2/m

04.FE.10 Nordstrandite Al(OH)3 P1 1

Other Nordstrandite Information

References:

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

See Also:

Links to other databases for Nordstrandite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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Ask about Nordstrandite 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 Nordstrandite Specimen Label here :

Nordstrandite

Al(OH)3
Dana No: 06.03.03.01 Strunz No: 04.FE.10
Locality:

Notes: