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Kuratite

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Dr. Gero Kurat
Formula:
Ca2(Fe2+5Ti)O2[Si4Al2O18]
Crystal System:
Triclinic
Name:
Named for Dr. Gero Kurat (1938-2009), meteorite researcher and Curator of the Meteorite Collection at the Natural History Museum Vienna. He had originally described the mineral as an unnamed phase.
The Fe2+-analogue of rhönite.


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Classification of KuratiteHide

Approved
Approval Year:
2013
First Published:
2004

Chemical Properties of KuratiteHide

Formula:
Ca2(Fe2+5Ti)O2[Si4Al2O18]

Crystallography of KuratiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 10.513(7) Å, b = 10.887(7) Å, c = 9.004(18) Å
α = 105.97(13)°, β = 96.00(12)°, γ = 124.82(4)°
Ratio:
a:b:c = 0.966 : 1 : 0.827
Unit Cell V:
767 ų
Z:
1
Morphology:
Euhedral to anhedral crystals. Faces observed: (0-11), (0-21) and (03-1)
Twinning:
twin plane(0-11)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.97(
2.72(
2.58(
2.44(
2.13(
2.12(
Comments:
From Type Description.

Occurrences of KuratiteHide

Paragenetic Mode(s):

Type Occurrence of KuratiteHide

General Appearance of Type Material:
As euhedral to anhedral crystals, < 20 μm in size, within a rim of olivine intergrowths at the contact between Fe sulfide spherules and the space-filling hedenbergite in the D'Orbigny meteorite
Place of Conservation of Type Material:
Type material is deposited in the collections of the Naturhistorisches Museum Wien, Vienna, Austria, inventory number Section D’Orbigny C-N1172-NH Wien
Geological Setting of Type Material:
In angrite (an achondritic meteorite)
Associated Minerals at Type Locality:

Synonyms of KuratiteHide

Other Language Names for KuratiteHide

Relationship of Kuratite to other SpeciesHide

Other Members of this group:
AenigmatiteNa2Fe2+5Ti(Si6O18)O2Tric. 1 : P1
KrinoviteNa2Mg4Cr3+2(Si6O18)O2Tric.
UM1991-29-SiO:FeMgNaNa4(Mg5Fe3+7)O4[Si9Fe3+3O36]
WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
Augite1 photo of Kuratite associated with Augite on mindat.org.
Magnetite1 photo of Kuratite associated with Magnetite on mindat.org.

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 KuratiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kurat et al. (2004): Geochimica et Cosmochimica Acta 68: 1901–1921. [as unnamed phase]
Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.-E. and Iizuka, Y. (2014) Kuratite, IMA 2013-109. CNMNC Newsletter No. 19, February 2014, page 168; Mineralogical Magazine: 78: 165-170.
Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.-E., Iizuka, Y. (2016): Kuratite, Ca4(Fe2+10Ti2)O4[Si8Al4O36], the Fe2+-analogue of rhönite, a new mineral from the D'Orbigny angrite meteorite. Mineralogical Magazine: 80: 1067-1076

Internet Links for KuratiteHide

Localities for KuratiteHide

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.
Argentina (TL)
 
  • Buenos Aires
    • Coronel Suaréz
      • D'Orbigny
Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.-E., Iizuka, Y. (2016): Kuratite, Ca4(Fe2+10Ti2)O4[Si8Al4O36], the Fe2+-analogue of rhönite, a new mineral from the D'Orbigny angrite meteorite. Mineralogical Magazine: 80: 1067-1076
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Aoult
http://adsabs.harvard.edu/abs/2007AGUFM.P41A0219K (as rhönite); http://www.hou.usra.edu/meetings/lpsc2014/pdf/1818.pdf
Mineral and/or Locality  
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