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Julgoldite-(Fe3+)

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About Julgoldite-(Fe3+)Hide

07102560015066351065138.jpg
Julian R. Goldsmith
Formula:
Ca2Fe3+Fe3+2(Si2O7)(SiO4)([OH]O) · H2O
Colour:
Black
Hardness:
Crystal System:
Monoclinic
Name:
Named in 1971 by Moore in honor of Julian Royce Goldsmith (26 February 1918, Chicago, Illinois, USA - 23 January 1999, USA), geochemist at the University of Chicago. He was an expert on feldspars and carbonates. He also served as president of the Geochemical Society, the Mineralogical Society of America, and the Geological Society of America.

Classification of Julgoldite-(Fe3+)Hide

Approved
Approval Year:
1966
First Published:
1971
9.BG.20

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
58.2.2.2

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)

Physical Properties of Julgoldite-(Fe3+)Hide

Colour:
Black
Streak:
Greenish-olive with a bluish tinge
Hardness:
4½ on Mohs scale

Chemical Properties of Julgoldite-(Fe3+)Hide

Formula:
Ca2Fe3+Fe3+2(Si2O7)(SiO4)([OH]O) · H2O
IMA Formula:
Ca2Fe3+Fe3+2(Si2O7)(SiO4)O(OH) · H2O

Crystallography of Julgoldite-(Fe3+)Hide

Crystal System:
Monoclinic

Type Occurrence of Julgoldite-(Fe3+)Hide

Reference:
Moore, P.B. (1971) Julgoldite, the Fe+2 - Fe+3 dominant pumpellyite, a new mineral from Långban, Sweden. Lithos: 4: 93-99.

Synonyms of Julgoldite-(Fe3+)Hide

Other Language Names for Julgoldite-(Fe3+)Hide

Relationship of Julgoldite-(Fe3+) to other SpeciesHide

Other Members of this group:
Julgoldite-(Fe2+)Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
Julgoldite-(Mg)Ca2MgFe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
OkhotskiteCa2Mn3+Mn3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
PoppiiteCa2V3+V3+2(Si2O7)(SiO4)([OH]O) · H2OMon. 2/m : B2/m
Pumpellyite-(Al)Ca2AlAl2(Si2O7)(SiO4)([OH]O) · H2OMon.
Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
Pumpellyite-(Fe3+)Ca2Fe3+Al2(Si2O7)(SiO4)([OH]O) · H2OMon.
Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2OMon.
Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
ShuiskiteCa2MgCr3+2(Si2O7)(SiO4)(OH)2 · H2OMon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Julgoldite-(Fe3+) associated with IlvaiteCaFe3+Fe2+2(Si2O7)O(OH)
1 photo of Julgoldite-(Fe3+) associated with StelleriteCa4(Si28Al8)O72 · 28H2O
1 photo of Julgoldite-(Fe3+) associated with ChalcedonySiO2
1 photo of Julgoldite-(Fe3+) associated with Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
1 photo of Julgoldite-(Fe3+) associated with Stilbite subgroup

Related Minerals - Nickel-Strunz GroupingHide

9.BG.MagnesiovesuvianiteCa19MgAl4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10](OH)(OH)9Tet. 4/m : P4/n
9.BG.AlumovesuvianiteCa19AlAl4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9Tet. 4/m : P4/n
9.BG.05bAllanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bAllanite-(La){CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bAllanite-(Y){CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon.
9.BG.05aClinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bDissakisite-(Ce){CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Dollaseite-(Ce){CaCe}{MgAlMg}(Si2O7)(SiO4)(OH)FMon. 2/m : P21/m
9.BG.05aEpidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05aHancockite{CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon.
9.BG.05Khristovite-(Ce){CaCe}{MgAlMn2+}(Si2O7)(SiO4)(OH)FMon. 2/m : P21/m
9.BG.05aMukhinite{Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH)Mon.
9.BG.05aPiemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon.
9.BG.05bManganiandrosite-(La){Mn2+La}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)Mon.
9.BG.05Tawmawite{Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
9.BG.05Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bFerriallanite-(Ce){CaCe}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Niigataite{CaSr}{Al3}(Si2O7)(SiO4)O(OH)Mon. 2/m
9.BG.05Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Dissakisite-(La){CaLa}{Al2Mg}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Vanadoandrosite-(Ce){Mn2+Ce}{V3+AlMn2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05Uedaite-(Ce){Mn2+Ce}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05aEpidote-(Sr){CaSr}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bAllanite-(Nd){CaNd}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bFerriallanite-(La){CaLa}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.05bÅskagenite-(Nd){Mn2+Nd}{Al2Fe3+}(Si2O7)(SiO4)O2Mon. 2/m : P21/m
9.BG.9.BG.Ferriakasakaite-(La){CaLa}{Fe3+AlMn2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
9.BG.9.BG.Ferriandrosite-(Ce){Mn2+REE}{Fe3+AlMn2+}(SiO4)(Si2O7)O(OH)
9.BG.9.BGFerriperbøeite-(Ce)(CaCe3)(Fe3+Al2Fe2+)(Si2O7)(SiO4)3O(OH)2Mon. 2/m : P21/m
9.BG.10ZoisiteCa2Al3[Si2O7][SiO4]O(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
9.BG.15MacfalliteCa2Mn3+3(SiO4)(Si2O7)(OH)3Mon.
9.BG.15SursassiteMn2+2Al3(SiO4)(Si2O7)(OH)3Mon. 2/m : P21/m
9.BG.20Julgoldite-(Fe2+)Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20OkhotskiteCa2Mn3+Mn3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Fe3+)Ca2Fe3+Al2(Si2O7)(SiO4)([OH]O) · H2OMon.
9.BG.20Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20ShuiskiteCa2MgCr3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Al)Ca2AlAl2(Si2O7)(SiO4)([OH]O) · H2OMon.
9.BG.20PoppiiteCa2V3+V3+2(Si2O7)(SiO4)([OH]O) · H2OMon. 2/m : B2/m
9.BG.20Julgoldite-(Mg)Ca2MgFe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.25GanomalitePb9Ca5Mn(Si2O7)4(SiO4)OHex.
9.BG.30RustumiteCa10(Si2O7)2(SiO4)(OH)2Cl2Mon.
9.BG.35VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc
9.BG.35WiluiteCa19MgAl4(Al,Mg)8(B,☐)4☐[Si2O7]4[(SiO4)10]O(O,OH)9Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc
9.BG.35ManganvesuvianiteCa19Mn3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9Tet. 4/m : P4/n
9.BG.35FluorvesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(F,OH)9Tet. 4/mmm (4/m 2/m 2/m)
9.BG.35CyprineCa19Cu2+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10](OH)(OH)9Tet. 4/m : P4/n
9.BG.40Vyuntspakhkite-(Y)(Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7Mon.
9.BG.45DellaiteCa6Si3O11(OH)2Tric.
9.BG.50Gatelite-(Ce)CaCe3Al2(Al,Mg)(Mg,Fe2+,Al)(Si2O7)(SiO4)3(O,F)(OH,O)2Mon. 2/m : P21/b
9.BG.55Västmanlandite-(Ce)Ce3CaMg2Al2Si2O15(OH)2FMon. 2/m : P21/m

Related Minerals - Dana Grouping (8th Ed.)Hide

58.2.2.1Julgoldite-(Fe2+)Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
58.2.2.3Okhotskite-(Mg)Ca8(Mn2+,Mg)(Mn3+,Al,Fe3+)(SiO4)(Si2O7)(OH)2 · H2OMon.
58.2.2.3Epidote-(Sr){CaSr}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
58.2.2.5Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
58.2.2.6Pumpellyite-(Fe3+)Ca2Fe3+Al2(Si2O7)(SiO4)([OH]O) · H2OMon.
58.2.2.7Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2OMon.
58.2.2.8Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
58.2.2.9ShuiskiteCa2MgCr3+2(Si2O7)(SiO4)(OH)2 · H2OMon.

Other InformationHide

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

References for Julgoldite-(Fe3+)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Moore, P.B. (1967) Eleven new minerals from Langban, Sweden. The Canadian Mineralogist: 9: 301-301.
Moore, P.B. (1971) Julgoldite, the Fe+2 - Fe+3 dominant pumpellyite, a new mineral from Långban, Sweden. Lithos: 4: 93-99.
Fleischer, M. (1971) New mineral names. American Mineralogist: 56: 2156-2159.
Passaglia, E., Gottardi, G. (1973) Crystal chemistry and nomenclature of pumpellyites and julgoldites. The Canadian Mineralogist: 12: 219-223.
Allmann, R., Donnay, G. (1973) The crystal structure of julgoldite. Mineralogical Magazine: 39: 271-281.
Artioli, G., Geiger, C.A., Dapiaggi. M. (2003) The crystal chemistry of julgoldite-Fe3+ from Bombay, India, studied using synchrotron X-ray powder diffraction and 57Fe Mössbauer spectroscopy. American Mineralogist: 88: 1084-1090.

Internet Links for Julgoldite-(Fe3+)Hide

Localities for Julgoldite-(Fe3+)Hide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada
 
  • Québec
    • Outaouais
      • Pontiac RCM
        • Otter Lake
Schumann, D., Martin, R.F., Fuchs, S., De Fourestier, J. (2019) Silicocarbonatitic melt inclusions in fluorapatite from the Yates prospect, Otter Lake, Québec: Evidence of marble anatexis in the central metasedimentary belt of the Grenville Province. The Canadian Mineralogist, 57(5), 583-604.
India
 
  • Maharashtra
www.cs.cmu.edu/~adg/adg-psssimages.html
AmMin 88:1084 (2003)
South Africa
 
  • Mpumalanga
    • Nkangala District
      • Belfast
Cairncross, B. & Windisch, W.(1998): Microminerals from the Bushveld Complex South Africa. Mineralogical Record 29: 461-465
Sweden (TL)
 
  • Värmland County
    • Filipstad
Moore, P.B. (1971): Julgoldite the Fe+2 - Fe+3 dominant pumpellyite. Lithos, 4, 93-99; Passaglia E, Gottardi G (1973) Crystal chemistry and nomenclature of pumpellyites and julgoldites. Canadian Mineralogist, 12, 219-223.
      • Persberg ore district
        • Pajsberg
Kjell Gatedal; RRUFF ID: R070261 (RRUFF id not confirmed)
 
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