Jagoite (original) (raw)

A valid IMA mineral species - grandfathered

About JagoiteHide

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Formula:

Pb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6

Originally thought to be (Pb,Ca)3FeSi3O10(Cl,OH)

Name:

Named in honor of John "Jack" Bernard Jago Trelawney (1 April 1909, Livorno, Italy - 2001), lawyer and amateur mineral collector from San Francisco, California, USA. He travelled through Europe and Africa visiting famous localities and assembled what was considered one of the finest private mineral collections in the late 1970s. The name recognizes the research funding he provided to the Swedish Museum of Natural History for the study of Långban minerals.

This page provides mineralogical data about Jagoite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2064:6

90a479be-aa4a-4fb7-a1b5-a3d6c682aad2

IMA Classification of JagoiteHide

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Approved, 'Grandfathered' (first described prior to 1959)

Type description reference:

Classification of JagoiteHide

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9.EG.50

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings

73.2.1.1

73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
2 : Condensed Tetrahedral Sheets with double and single layers

17.3.10

17 : Silicates Containing other Anions
3 : Silicates with chloride (including aluminosilicates)

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of JagoiteHide

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Comment:

Shining on cleavages

Density:

5.43 g/cm3 (Measured)

Optical Data of JagoiteHide

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RI values:

_n_ω = 2.000 _n_ε = 1.970

δ = 0.030

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Pleochroism:

Non-pleochroic

Chemistry of JagoiteHide

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Mindat Formula:

Pb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6

Originally thought to be (Pb,Ca)3FeSi3O10(Cl,OH)

Common Impurities:

Ti,Al,Mn,Be,Mg,Ca,Na,K,H2O

Crystallography of JagoiteHide

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Class (H-M):

6_m_2 - Ditrigonal Dipyramidal

Cell Parameters:

a = 8.528(8) Å, c = 33.33(3) Å

Unit Cell V:

2,099.23 ų (Calculated from Unit Cell)

Morphology:

Fine-grained micaceous aggregates.

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0000843	Jagoite	Mellini M, Merlino S (1981) The crystal structure of jagoite American Mineralogist 66 852-858		1981	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of JagoiteHide

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General Appearance of Type Material:

Fine-grained micaceous aggregatesof plates, commonly surrounded by a zone of black melanotekite.

Place of Conservation of Type Material:

Associated Minerals at Type Locality:

Reference:

Blix, R., Gabrielson, O., Wickman, F.E. (1957) Jagoite, a new lead-silicate mineral from Långban in Sweden. Arkiv för Mineralogi och Geologi: 2: 315-317.

Other Language Names for JagoiteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of JagoiteHide

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Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for JagoiteHide

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References for JagoiteHide

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Localities for JagoiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.