Manganolangbeinite Mineral Data

General Manganolangbeinite Information

Chemical Formula:

K2Mn2(SO4)3

Composition:

Molecular Weight = 476.26 gm

Potassium 16.42 % K 19.78 % K₂O

Manganese 23.07 % Mn 29.79 % MnO

Sulfur 20.20 % S 50.43 % SO₃

Oxygen 40.31 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Mn²⁺₂(SO₄)₃

Environment:

In a cavern in lava, in thenardite and halite stalactites, formed by fumarolic action.

IMA Status:

Valid Species (Pre-IMA) 1924

Locality:

Vesuvius, Campania, Italy. Link to MinDat.org Location Data.

Name Origin:

Named as a manganese compound analogous to langbeinite.

Synonym:

ICSD 200897

PDF 20-909

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Manganolangbeinite Crystallography

Cell Dimensions:

a = 10.014, Z = 4; V = 1,004.21 Den(Calc)= 3.15

Crystal System:

Isometric - TetartoidalH-M Symbol (2 3) Space Group: P 2₁3

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

By Intensity(I/I_o): 3.2(1), 2.7(0.5), 3.05(0.18),

Physical Properties of Manganolangbeinite

Cleavage:

None

Color:

Pink.

Density:

3.02

Diaphaneity:

Transparent to Translucent

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Manganolangbeinite

Gladstone-Dale:

CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1816,KPDmeas= 0.1894,KC= 0.1867
Ncalc = 1.56 - 1.59

Optical Data:

Isotropic, n=1.572.

Calculated Properties of Manganolangbeinite

Electron Density:

Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Manganolangbeinite =3.02 gm/cc.

Fermion Index:

Fermion Index = 0.0017280878
Boson Index = 0.9982719122

Photoelectric:

PE_{Manganolangbeinite}= 8.75 barns/electron
U=PE_{Manganolangbeinite} x r_electron= 25.76 barns/cc.

Radioactivity:

GRapi = 230.80 (Gamma Ray American Petroleum Institute Units)
Concentration of Manganolangbeinite per GRapi unit = 0.43 (%)

Estimated Radioactivity from Manganolangbeinite - barely detectable

Manganolangbeinite Classification

Dana Class:

28.04.04.02 (28)Anhydrous Acid and Sulfates

(28.04)with miscellaneous formulae

(28.04.04)Langbeinite Series

28.04.04.01 Langbeinite K2Mg2(SO4)3 P 2₁3 2 3

28.04.04.02 Manganolangbeinite K2Mn2(SO4)3 P 2₁3 2 3

28.04.04.03 Efremovite (NH4)2Mg2(SO4)3 P 2₁3 2 3

Strunz Class:

07.AC.10 07 - SULFATES (SELENATES, TELLURATES)

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

07.AC -With medium-sized and large cations

07.AC.10 Efremovite (NH4)2Mg2(SO4)3 P 2₁3 2 3

07.AC.10 Manganolangbeinite K2Mn2(SO4)3 P 2₁3 2 3

07.AC.10 Langbeinite K2Mg2(SO4)3 P 2₁3 2 3

Other Manganolangbeinite 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 Manganolangbeinite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Manganolangbeinite

K2Mn2(SO4)3
Dana No: 28.04.04.02 Strunz No: 07.AC.10
Locality:

Notes: