Loweite Mineral Data

General Loweite Information

Chemical Formula:

Na12Mg7(SO4)13•15(H2O)

Composition:

Molecular Weight = 1,965.07 gm

Sodium 14.04 % Na 18.92 % Na₂O

Magnesium 8.66 % Mg 14.36 % MgO

Hydrogen 1.54 % H 13.75 % H₂O

Sulfur 21.21 % S 52.97 % SO₃

Oxygen 54.55 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₁₂Mg₇(SO₄)₁₃•15(H₂O)

Environment:

Uncommon mineral in marine salt deposits.

IMA Status:

Valid Species (Pre-IMA) 1847

Locality:

Ischl, Hallstatt, and Hall, Austria. Link to MinDat.org Location Data.

Name Origin:

Alexander Lowe (1808-1895), Austrian chemist, Chief Assayer at the Mint, Vienna, Austria.

Name Pronunciation:

Loweite

Synonym:

Loeweite

Loweite Image

Images:

Loweite

Comments: Opaque white crystalline lÃ¶weite with clear colorless halite.
Location: Wilhelmshall, near Stassfurt, Sachsen-Anhalt, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Loweite Crystallography

Axial Ratios:

a:c = 1:0.71207

Cell Dimensions:

a = 18.866, c = 13.434, Z = 3; V = 4,140.91 Den(Calc)= 2.36

Crystal System:

Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 3.17(1), 4.04(0.95), 4.29(0.95),

Physical Properties of Loweite

Color:

Colorless, Gray, Pale yellow, Reddish yellow.

Density:

2.36 - 2.38, Average = 2.37

Diaphaneity:

Transparent

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous (Glassy)

Optical Properties of Loweite

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2036,KPDmeas= 0.2027,KC= 0.2052
Ncalc = 1.48 - 1.49

Optical Data:

Uniaxial (-), e=1.471, w=1.49, bire=0.0190.

Calculated Properties of Loweite

Electron Density:

Bulk Density (Electron Density)=2.38 gm/cc
note: Specific Gravity of Loweite =2.36 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Loweite= 1.73 barns/electron
U=PE_Loweite x rElectron Density= 4.11 barns/cc.

Radioactivity:

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

Loweite Classification

Dana Class:

29.04.03.01 (29)Hydrated Acid and Sulfates

(29.04)where (A+)2 Bn (XO4)p ï¿½ x(H2O)

(29.04.03)Dana Group

29.04.03.01 Loweite Na12Mg7(SO4)13•15(H2O) R 3 3

Strunz Class:

07.CC.45 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CC -With medium-sized and large cations

07.CC.45 Loweite Na12Mg7(SO4)13•15(H2O) R 3 3

Other Loweite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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

Loweite

Na12Mg7(SO4)13•15(H2O)
Dana No: 29.04.03.01 Strunz No: 07.CC.45
Locality:

Notes:

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