Philolithite Mineral Data

General Philolithite Information

Chemical Formula:

Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12

Composition:

Molecular Weight = 3,587.70 gm

Magnesium 1.35 % Mg 2.25 % MgO

Manganese 7.66 % Mn 9.89 % MnO

Hydrogen 0.34 % H 3.01 % H₂O

Lead 69.30 % Pb 74.65 % PbO

Carbon 1.34 % C 4.91 % CO₂

Sulfur 0.89 % S 2.23 % SO₃

Chlorine 3.95 % Cl 3.95 % Cl

- % Cl -0.89 % -O=Cl₂

Oxygen 15.16 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₁₂O₆Mg₂Mn²⁺₅(SO₄)(CO₃)₄(OH)₁₂Cl₄

Environment:

Crust-like overgrowths and simple tetragonal tablets on subhedral lead, and on lead wire in a calcite-rich Mn oxide ore matrix. A late-stage fissure mineral in a skarn assemblage,

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Langban, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

The name is from the Greek philos (=loving) and lithos (=stone) in honor of the Friends of Mineralogy.

Name Pronunciation:

Philolithite + Pronunciation

Synonym:

ICSD 89834

IMA1996-020

PDF 51-1455

Philolithite Image

Images:

Philolithite

Comments: Dark green mass of philolithite.
Location: Langban, VÃ¤rmland, Sweden. Scale: Specimen Size 7x5x3 mm.
© Sergey Vasiliev / Systematic Mineralogy

Philolithite Crystallography

Axial Ratios:

a:c = 1:0.99746

Cell Dimensions:

a = 12.627, c = 12.595, Z = 2; V = 2,008.16 Den(Calc)= 5.93

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4₁/nnm

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

By Intensity(I/I_o): 2.975(1), 2.752(0.3), 3.99(0.3),

Forms:

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Forms: ( 1 1 1) ( 1 1 0) ( 0 0 1)

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Crystal Structure:

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Moore P B , Kampf A R , Sen Gupta P K , American Mineralogist , 85 (2000) p.810-816, The crystal structure of philolithite, a trellis-like open, framework based on cubic closest-packing of anions

Physical Properties of Philolithite

Cleavage:

None

Color:

Green, Emerald green.

Density:

5.91

Diaphaneity:

Transparent to translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Adamantine

Streak:

white

Optical Properties of Philolithite

Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.158,KPDmeas= 0.1585,KC= 0.1603
Ncalc = 1.95

Optical Data:

Biaxial (+), a=1.92, b=1.94, g=1.95, bire=0.0300

Calculated Properties of Philolithite

Electron Density:

Bulk Density (Electron Density)=5.02 gm/cc
note: Specific Gravity of Philolithite =5.91 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

PE_Philolithite=1,254.07 barns/electron
U=PE_Philolithite x rElectron Density=6,300.79 barns/cc.

Radioactivity:

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

Philolithite Classification

Dana Class:

32.03.04.02 (32)Compound Sulfates

(32.03)(anhydrous) with poly-anionic formula

(32.03.04)Dana Group

32.03.04.01 Hauckite (Mg,Mn)24Zn18Fe3(SO4)4(CO3)2(OH)81(?) P 6/mmm 6/m 2/m 2/m

32.03.04.02 Philolithite! Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12 P 4₁/nnm 4/m 2/m 2/m

Strunz Class:

05.BF.35 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BF -With (Cl), SO4, PO4, TeO3

05.BF.35 Philolithite! Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12 P 4₁/nnm 4/m 2/m 2/m

Other Philolithite Information

References:

NAME( MinRec) PHYS. PROP.(Min.Mag.,Vol.61,p733,1997) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Philolithite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Ask about Philolithite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Print or Cut-and-Paste your Philolithite Specimen Label here :

Philolithite

Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12
Dana No: 32.03.04.02 Strunz No: 05.BF.35
Locality:

Notes: