Ganomalite Mineral Data

Ganomalite Mineral Data +

General Ganomalite Information

Chemical Formula:

Pb9Ca5Mn++Si9O33

Composition:

Molecular Weight = 2,900.88 gm

Calcium 6.91 % Ca 9.67 % CaO

Manganese 1.89 % Mn 2.45 % MnO

Silicon 8.71 % Si 18.64 % SiO₂

Lead 64.28 % Pb 69.25 % PbO

Oxygen 18.20 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₉Ca₅Mn²⁺Si₉O₃₃

IMA Status:

Valid Species (Pre-IMA) 1876

Locality:

Vermland, Sweden. Link to MinDat.org Location Data.

Synonym:

ICSD 50268

PDF 25-150

Ganomalite Image

Images:

Ganomalite Jacobsite

Comments: White crystalline ganomalite with dark granular jacobsite.
Location: Jacobsberg, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ganomalite Crystallography

Axial Ratios:

a:c = 1:1.03156

Cell Dimensions:

a = 9.82, c = 10.13, Z = 1; V = 845.99 Den(Calc)= 5.69

Crystal System:

Trigonal - PyramidalH-M Symbol (3) Space Group: P 3

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

By Intensity(I/I_o): 3.06(1), 3.53(0.9), 3.38(0.8),

Crystal Structure:

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Dunn P J , Peacor D R , Valley J W , Randall C A , Mineralogical Magazine , 49 (1985) p.579-582, Ganomalite from Franklin, New Jersey, and Jakobsberg, Sweden:, New chemical and crystallographic data, Note: structure from ICSD

Physical Properties of Ganomalite

Cleavage:

[???] Good

Color:

Colorless, Gray, White.

Density:

5.74

Diaphaniety:

Translucent to transparent

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3 - Calcite

Luster:

Vitreous - Adamantine

Streak:

white

Optical Properties of Ganomalite

Gladstone-Dale:

CI meas= -0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.045 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.163,KPDmeas= 0.1616,KC= 0.156

Optical Data:

Uniaxial (+), w=1.91, e=1.945, bire=0.0350.

Calculated Properties of Ganomalite

Electron Density:

r_electron=4.96 gm/cc
note: r_Ganomalite=5.74 gm/cc.

Fermion Index

Fermion Index = 0.14631
Boson Index = 0.85369

Photoelectric:

PE_Ganomalite=1,144.22 barns/electron
U=PE_Ganomalite x r_electron=5,673.78 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ganomalite is Not Radioactive

Ganomalite Classification

Dana Class:

78.2.1.1 (78)Unclassified silicates

(78.2)possible sorosilicates

(78.2.1)Dana Group

78.2.1.1 Ganomalite Pb9Ca5MnSi9O33 P 3 3

Strunz Class:

VIII/C.27-10 VIII - Silicates

VIII/C - Sorosilicates, mixed structure with [SiO4]2- "inseln" and [Si2O7]6- groups

VIII/C.27 - Ganomalite - Queitite series

VIII/C.27-10 Ganomalite Pb9Ca5MnSi9O33 P 3 3

VIII/C.27-20 Queitite Pb4Zn2(SiO4)(Si2O7)(SO4) P 2₁ 2

Other Ganomalite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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

Ganomalite

Pb9Ca5Mn++Si9O33
Dana No: 78.2.1.1 Strunz No: VIII/C.27-10
Locality:

Notes: