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Åskagenite-(Nd)

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About Åskagenite-(Nd)Hide

Formula:
{Mn2+Nd}{Al2Fe3+}(Si2O7)(SiO4)O2
Colour:
Black
Lustre:
Resinous
Hardness:
6
Specific Gravity:
3.737
Crystal System:
Monoclinic
Name:
Named in 2010 by Nikita V. Chukanov, Jörg Göttlicher, Steffen Möckel, Zdnek Sofer, Konstantin V. Van, and Dmetry I. Belakovskiy for the type locality at Åskagen (Torskebäcken), Filipstad, Värmland, Sweden.
Åskagenite Group h of the Epidote Supergroup.
Nd-Fe3+-analogue of uedaite-(Ce).


Classification of Åskagenite-(Nd)Hide

Approved
Approval Year:
2009
First Published:
2010
9.BG.05b

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
58.2.9.5

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 Åskagenite-(Nd)Hide

Resinous
Transparency:
Translucent
Colour:
Black
Comment:
Brown in translucent thin fragments
Streak:
Brown
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
3.737(5) g/cm3 (Measured)    4.375 g/cm3 (Calculated)
Comment:
Measured density for a metamict sample.

Optical Data of Åskagenite-(Nd)Hide

Type:
Isotropic
RI values:
n = 1.712(2)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
High

Chemical Properties of Åskagenite-(Nd)Hide

Formula:
{Mn2+Nd}{Al2Fe3+}(Si2O7)(SiO4)O2
IMA Formula:
Mn2+NdAl2Fe3+(Si2O7)(SiO4)O2

Crystallography of Åskagenite-(Nd)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 8.78 (1) Å, b = 5.710(6) Å, c = 10.02(1) Å
β = 114.6(2)°
Ratio:
a:b:c = 1.538 : 1 : 1.755
Unit Cell V:
456.7 ų
Z:
2
Comment:
Metamict; crystallographic data for heated material.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.50 (46)
3.22 (50)
2.897 (100)
2.850 (73)
2.687 (73)
2.606 (52)
2.121 (48)
1.630 (59)
Comments:
After heating in a nitrogen atmosphere; sample from the type locality.

Type Occurrence of Åskagenite-(Nd)Hide

General Appearance of Type Material:
Coarse prismatic, sometimes flattened crystals with rectangular outlines up to 1 × 4 cm in size.
Place of Conservation of Type Material:
Mining Academy, Freiberg, Germany (82194, 82218); Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (92949).
Geological Setting of Type Material:
In a granite pegmatite.
Associated Minerals at Type Locality:

Synonyms of Åskagenite-(Nd)Hide

Relationship of Åskagenite-(Nd) to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Microcline1 photo of Åskagenite-(Nd) associated with Microcline on mindat.org.
Allanite-(Nd)1 photo of Åskagenite-(Nd) associated with Allanite-(Nd) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.BG.XCyprineCa19Cu2+(Al10Mg2)Si18O68(OH)10Tet. 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.05Hancockite{CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon.
9.BG.05Khristovite-(Ce){CaCe}{MgAlMn2+}(Si2O7)(SiO4)(OH)FMon. 2/m : P21/m
9.BG.05Mukhinite{Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH)Mon.
9.BG.05Piemontite{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.05Epidote-(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.10Zoisite{Ca2}{Al3}(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.20OkhotskiteCa2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Fe3+)Ca2(Fe3+,Mg)(Al,Fe3+)2(Si2O7)(SiO4)(OH,O)2 · H2OMon.
9.BG.20Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
9.BG.20ShuiskiteCa2MgCr2(Si2O7)(SiO4)(OH)2 · 2H2OMon.
9.BG.20Julgoldite-(Fe3+)Ca2Fe3+Fe3+2(Si2O7)(SiO4)O(OH) · H2OMon.
9.BG.20Pumpellyite-(Al)Ca2Al3(Si2O7)(SiO4)(OH,O)2 · H2OMon.
9.BG.20PoppiiteCa2(V3+,Fe3+,Mg)(V3+,Al)2(Si2O7)(SiO4)(OH,O)2 · 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.35Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc
9.BG.35WiluiteCa19(Al,Mg)13(B,☐,Al)5(Si2O7)4(SiO4)10(O,OH)10Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc
9.BG.35ManganvesuvianiteCa19Mn3+(Al,Mn3+,Fe3+)10(Mg,Mn2+)2(Si2O7)4(SiO4)10O(OH)9Tet. 4/m : P4/n
9.BG.35FluorvesuvianiteCa19(Al,Mg,Fe2+)13(Si2O7)4(SiO4)10O(F,OH)9Tet. 4/mmm (4/m 2/m 2/m)
9.BG.40Vyuntspakhkite-(Y)(Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7
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

58.2.9.4Uedaite-(Ce){Mn2+Ce}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m

Other InformationHide

Notes:
The mineral is slightly radioactive.
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 Åskagenite-(Nd)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
IMA Approvals - December 2009
Chukanov, N.V., Göttlicher, J., Möckel, S., Sofer, Z., Van, K.V., Belakovskiy, D.I. (2010) Åskagenite-(Nd) Mn2+NdAl2Fe3+(Si2O7)(SiO4)O2, a new mineral of the epidote supergroup. Novye dannye o mineralakh: 45: 17–22 (in Russian). New data on minerals: 45: 17–22 (in English).

Internet Links for Åskagenite-(Nd)Hide

Localities for Åskagenite-(Nd)Hide

ⓘ - 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.
Sweden (TL)
 
  • Värmland
    • Filipstad
      • Persberg district
Chukanov, N.V., Göttlicher, J., Möckel, S., Sofer, Z., Van, K.V. & Belakovskiy, D.I. (2010): Åskagenite-(Nd) Mn2+NdAl2Fe3+(Si2O7)(SiO4)O2, a new mineral of the epidote supergroup. Novye dannye o mineralakh, 45, 17–22 (in Russian). New data on minerals, 45, 17–22 (in English).
Mineral and/or Locality  
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