Jagoite Mineral Data

Jagoite Mineral Data +

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General Jagoite Information

Chemical Formula:

(Pb,Na,Ca)3(Fe+++,Mg)Si3O10(Cl,OH)

Composition:

Molecular Weight = 834.25 gm

Sodium 0.55 % Na 0.74 % Na₂O

Calcium 0.48 % Ca 0.67 % CaO

Magnesium 0.58 % Mg 0.97 % MgO

Iron 5.36 % Fe 7.66 % Fe₂O₃

Silicon 10.44 % Si 22.33 % SiO₂

Hydrogen 0.02 % H 0.22 % H₂O

Lead 59.61 % Pb 61.91 % Pb₂O

Chlorine 3.40 % Cl 3.40 % Cl

- % Cl -0.77 % -O=Cl₂

Oxygen 19.56 % O

______ ______

100.00 % 97.12 % = TOTAL OXIDE

Empirical Formula:

Pb_2.4Na_0.2Ca_0.1Fe³⁺_0.8Mg_0.2Si_3.1O₁₀Cl_0.8(OH)_0.2

Environment:

In hematite ores.

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

At Lanban, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for John B. Jago Trelawney (1909-), mineral collector of Palo Alto, California, USA.

Synonym:

ICSD 100874

PDF 36-417

Jagoite Image

Images:

Jagoite

Comments: Yellow crystalline fragment of jagoite in hausmannite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jagoite Crystallography

Axial Ratios:

a:c = 1:3.9083

Cell Dimensions:

a = 8.528, c = 33.33, Z = 8; V = 2,099.23 Den(Calc)= 5.28

Crystal System:

Hexagonal - Ditrigonal DipyramidalH-M Symbol (6 m2) Space Group: P 62c

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

By Intensity(I/I_o): 3.4(1), 2.8(0.8), 4.16(0.5),

Crystal Structure:

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Mellini M , Merlino S , American Mineralogist , 66 (1981) p.852-858, The crystal structure of jagoite

Physical Properties of Jagoite

Cleavage:

[0001] Perfect

Color:

Yellow green.

Density:

5.43

Diaphaniety:

Semitransparent

Fracture:

Flexible - Flexible fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Micaceous - Platy texture with "flexible" plates.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

yellow

Optical Properties of Jagoite

Gladstone-Dale:

CI meas= -1.09 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -1.149 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1866,KPDmeas= 0.1814,KC= 0.0868

Optical Data:

Uniaxial (-), e=1.97, w=2, bire=0.0300.

Calculated Properties of Jagoite

Electron Density:

r_electron=4.73 gm/cc
note: r_Jagoite=5.43 gm/cc.

Fermion Index

Fermion Index = 0.13842
Boson Index = 0.86158

Photoelectric:

PE_Jagoite=1,054.07 barns/electron
U=PE_Jagoite x r_electron=4,980.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Jagoite is Not Radioactive

Jagoite Classification

Dana Class:

73.2.1.1 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.2)with double and single layers

(73.2.1)Dana Group

73.2.1.1 Jagoite (Pb,Na,Ca)3(Fe,Mg)Si3O10(Cl,OH) P 62c 6 m2

73.2.1.2 Hyttsjoite! Pb18Ba2Ca5Mn2Fe2Si30O90Cl·6(H2O) R 3 3

Strunz Class:

VIII/H.35-10 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica minerals with other simple layers, [Si6O15]6- and others

VIII/H.35 - Jagoite - Maricopaite series

VIII/H.35-10 Jagoite (Pb,Na,Ca)3(Fe,Mg)Si3O10(Cl,OH) P 62c 6 m2

VIII/H.35-15 Hyttsjoite! Pb18Ba2Ca5Mn2Fe2Si30O90Cl·6(H2O) R 3 3

VIII/H.35-20 Maricopaite Pb7Ca2(Si,Al)48O100·32(H2O) Cm2m 2/m 2/m 2/m

Other Jagoite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Jagoite

(Pb,Na,Ca)3(Fe+++,Mg)Si3O10(Cl,OH)
Dana No: 73.2.1.1 Strunz No: VIII/H.35-10
Locality:

Notes: