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Julgoldite-(Fe3+)

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Formula:
Ca2(Fe3+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH,O)2 · H2O
System:
Monoclinic
Lustre:
Hardness:
Name:
Named in 1971 by Moore for Julian Royce Goldsmith (1918-1999), American geochemist, University of Chicago.

Classification of Julgoldite-(Fe3+)

Approved 1966
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)
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First Recorded Occurrence of Julgoldite-(Fe3+)

Physical Properties of Julgoldite-(Fe3+)

Hardness (Mohs):

Crystallography of Julgoldite-(Fe3+)

Crystal System:
Monoclinic

Chemical Properties of Julgoldite-(Fe3+)

Formula:
Ca2(Fe3+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH,O)2 · H2O
Essential elements:
All elements listed in formula:

Relationship of Julgoldite-(Fe3+) to other Species

Other Members of Group:
Julgoldite-(Fe2+)Ca2(Fe2+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2 · H2O
Julgoldite-(Mg)Ca2(Mg,Fe2+)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2 · H2O
OkhotskiteCa2(Mn2+,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
PoppiiteCa2(V3+,Fe3+,Mg)(V3+,Al)2(Si2O7)(SiO4)(OH,O)2 · H2O
Pumpellyite-(Al)Ca2(Al,Fe2+,Mg)Al2(Si2O7)(SiO4)(OH,O)2 · H2O
Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Pumpellyite-(Fe3+)Ca2(Fe3+,Mg,Fe2+)(Al,Fe3+)2(Si2O7)(SiO4)(OH,O)2 · H2O
Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Pumpellyite-(Mn2+)Ca2(Mn2+,Mg)(Al,Mn3+,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
ShuiskiteCa2(Mg,Al)(Cr,Al)2(Si2O7)(SiO4)(OH)2 · 2H2O
9.BG.05bAllanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
9.BG.05bAllanite-(La){CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
9.BG.05bAllanite-(Y){CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
9.BG.05aClinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
9.BG.05bDissakisite-(Ce){CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH)
9.BG.05Dollaseite-(Ce){CaCe}{MgAlMg}(Si2O7)(SiO4)(OH)F
9.BG.05aEpidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
9.BG.05Epidote-(Pb){CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
9.BG.05Khristovite-(Ce){CaCe}{MgAlMn2+}(Si2O7)(SiO4)(OH)F
9.BG.05Mukhinite{Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH)
9.BG.05Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
9.BG.05Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
9.BG.05bManganiandrosite-(La){Mn2+La}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
9.BG.05Tawmawite{Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
9.BG.05Manganipiemontite-(Sr){CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
9.BG.05bFerriallanite-(Ce){CaCe}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH)
9.BG.05Clinozoisite-(Sr){CaSr}{Al3}(Si2O7)(SiO4)O(OH)
9.BG.05Manganiandrosite-(Ce){(Mn2+,Ca)(Ce,REE)}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
9.BG.05Dissakisite-(La){CaLa}{Al2Mg}(Si2O7)(SiO4)O(OH)
9.BG.05Vanadoandrosite-(Ce){Mn2+Ce}{V3+AlMn2+}(Si2O7)(SiO4)O(OH)
9.BG.05Uedaite-(Ce){Mn2+Ce}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
9.BG.05Epidote-(Sr){CaSr}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
9.BG.05bAllanite-(Nd){CaNd}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
9.BG.05bFerriallanite-(La){CaLa}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH)
9.BG.05bÅskagenite-(Nd){Mn2+Nd}{Al2Fe3+}(Si2O7)(SiO4)O2
9.BG.10Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
9.BG.15MacfalliteCa2(Mn3+,Al)3(Si2O7)(SiO4)(OH)3
9.BG.15SursassiteMn22+Al3(Si2O7)(SiO4)(OH)3
9.BG.20Julgoldite-(Fe2+)Ca2(Fe2+,Mg)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2 · H2O
9.BG.20OkhotskiteCa2(Mn2+,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
9.BG.20Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2O
9.BG.20Pumpellyite-(Fe3+)Ca2(Fe3+,Mg,Fe2+)(Al,Fe3+)2(Si2O7)(SiO4)(OH,O)2 · H2O
9.BG.20Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
9.BG.20Pumpellyite-(Mn2+)Ca2(Mn2+,Mg)(Al,Mn3+,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
9.BG.20ShuiskiteCa2(Mg,Al)(Cr,Al)2(Si2O7)(SiO4)(OH)2 · 2H2O
9.BG.20Pumpellyite-(Al)Ca2(Al,Fe2+,Mg)Al2(Si2O7)(SiO4)(OH,O)2 · H2O
9.BG.20PoppiiteCa2(V3+,Fe3+,Mg)(V3+,Al)2(Si2O7)(SiO4)(OH,O)2 · H2O
9.BG.20Julgoldite-(Mg)Ca2(Mg,Fe2+)(Fe3+,Al)2(Si2O7)(SiO4)(OH)2 · H2O
9.BG.25GanomalitePb9Ca5Mn(Si2O7)4(SiO4)O
9.BG.30RustumiteCa10(Si2O7)2(SiO4)(OH)2Cl2
9.BG.35Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
9.BG.35WiluiteCa19(Al,Mg)13(B,☐,Al)5(Si2O7)4(SiO4)10(O,OH)10
9.BG.35ManganvesuvianiteCa19Mn3+(Al,Mn3+,Fe3+)10(Mg,Mn2+)2(Si2O7)4(SiO4)10O(OH)9
9.BG.35FluorvesuvianiteCa19(Al,Mg,Fe2+)13(Si2O7)4(SiO4)10O(F,OH)9
9.BG.40Vyuntspakhkite-(Y)(Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7
9.BG.45DellaiteCa6(Si2O7)(SiO4)(OH)2
9.BG.50Gatelite-(Ce)CaCe3Al2(Al,Mg)(Mg,Fe2+,Al)(Si2O7)(SiO4)3(O,F)(OH,O)2
9.BG.55Västmanlandite-(Ce)Ca(Ce,La)3Al2Mg2(Si2O7)(SiO4)3(OH)2F

Other Names for Julgoldite-(Fe3+)

Name in Other Languages:

Other Information

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+)

Reference List:
Canadian Mineralogist (1973): 12: 219.

Mineralogical Magazine (1973): 39: 271.

Internet Links for Julgoldite-(Fe3+)

Localities for Julgoldite-(Fe3+)

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
India
 
  • Maharashtra
www.cs.cmu.edu/~adg/adg-psssimages.html
AmMin 88:1084 (2003)
South Africa
 
  • Mpumalanga Province
    • Nkangala District
      • Middelburg
Cairncross, B. & Windisch, W.(1998): Microminerals from the Bushveld Complex South Africa. Mineralogical Record 29: 461-465
Sweden
 
  • Värmland
    • 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 district
        • Pajsberg
Kjell Gatedal; RRUFF ID: R070261 (RRUFF id not confirmed)
Mineral and/or Locality  
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