Palmierite Mineral Data

General Palmierite Information

Chemical Formula:

(K,Na)2Pb(SO4)2

Composition:

Molecular Weight = 469.47 gm

Potassium 12.49 % K 15.05 % K₂O

Sodium 2.45 % Na 3.30 % Na₂O

Lead 44.13 % Pb 47.54 % PbO

Sulfur 13.66 % S 34.11 % SO₃

Oxygen 27.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_1.5Na_0.5Pb(SO₄)₂

Environment:

Fumarolic sublimate.

IMA Status:

Valid Species (Pre-IMA) 1907

Locality:

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

Name Origin:

Named for Luigi Palmieri (1807-1896), Italian physicist, Director of the Vesuvius Observatory, Italy.

Name Pronunciation:

Palmierite + Pronunciation

Synonym:

ICSD 27652

PDF 29-1015

Palmierite Crystallography

Axial Ratios:

a:c = 1:3.79417

Cell Dimensions:

a = 5.495, c = 20.849, Z = 3; V = 545.19 Den(Calc)= 4.29

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 3.14(1), 1.24(0.9), 1.76(0.9),

Physical Properties of Palmierite

Color:

Colorless, White.

Density:

4.33

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Palmierite

Gladstone-Dale:

CI meas= -0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.166,KPDmeas= 0.1644,KC= 0.1594
Ncalc = 1.68 - 1.69

Optical Data:

Uniaxial (-), w=1.712.

Calculated Properties of Palmierite

Electron Density:

Bulk Density (Electron Density)=3.91 gm/cc
note: Specific Gravity of Palmierite =4.33 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Palmierite= 752.49 barns/electron
U=PE_Palmierite x r_electron=2,942.69 barns/cc.

Radioactivity:

GRapi = 162.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Palmierite per GRapi unit = 0.61 (%)

Estimated Radioactivity from Palmierite - barely detectable

Palmierite Classification

Dana Class:

28.04.03.01 (28)Anhydrous Acid and Sulfates

(28.04)with miscellaneous formulae

(28.04.03)Dana Group

28.04.03.01 Palmierite (K,Na)2Pb(SO4)2 R 3m 3 2/m

28.04.03.02 Kalistrontite K2Sr(SO4)2 R 3m 3 2/m

Strunz Class:

07.AD.40 07 - SULFATES (SELENATES, TELLURATES)

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

07.AD -With only large cations

07.AD.40 Kalistrontite K2Sr(SO4)2 R 3m 3 2/m

07.AD.40 Palmierite (K,Na)2Pb(SO4)2 R 3m 3 2/m

Other Palmierite 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 Palmierite :
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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Palmierite

(K,Na)2Pb(SO4)2
Dana No: 28.04.03.01 Strunz No: 07.AD.40
Locality:

Notes:

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