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Shulamitite

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Formula:
Ca3TiFe3+AlO8
System:
Orthorhombic
Colour:
Reddish brown
Hardness:
6 - 7
Name:
In honour of Dr. Shulamit Gross (1923-2012), emeritus member of the Geological Survey of Israel. The name of this reddish brown mineral is also related to biblical Shulamit, red-haired sweetheart of King Solomon.
Intermediate, entropy-stabilised phase between brownmillerite and perovskite.

Known as a synthetic phase.

Compare also Unnamed (Ca-Ti-Fe-Al Oxide II).

Classification of Shulamitite

Approved 2011
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http://www.mindat.org/min-41290.html
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Type Occurrence of Shulamitite

General Appearance of Type Material:
Reddish brown subhedral grains or prismatic platelets up to 0.2 mm and intergrowths up to 0.5 mm.
Place of Conservation of Type Material:
Mineralogical Museum of St. Petersburg State University, St. Petersburg (number 1/19465) and the Central Siberian Geological Museum of V. S. Sobolev Institute of Geology and Mineralogy, Novosibirsk (number VII-87/1), both in Russia.
Year of Discovery:
2011
Geological Setting of Type Material:
Major to accessory mineral in high-temperature metacarbonate larnite rocks.

Physical Properties of Shulamitite

Adamantine, Sub-Metallic
Colour:
Reddish brown
Streak:
Light brown
Hardness (Mohs):
6 - 7
Hardness (Vickers):
VHN100=683 - 977 kg/mm2
Cleavage:
Distinct/Good
Good on {010} and imperfect on {001} and {100}
Fracture:
Irregular/Uneven
Density:
3.84 g/cm3 (Calculated)
Comment:
Density in the range 3.84-3.865 was calculated

Crystallography of Shulamitite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmma
Space Group Setting:
Pmma
Cell Parameters:
a = 5.4200(6) Å, b = 11.064(1) Å, c = 5.5383(7) Å
Ratio:
a:b:c = 0.49 : 1 : 0.501
Unit Cell Volume:
V 332.12 ų
Z:
2
Morphology:
Xenomorphic or subhedral grains and their intergrowths. Individual prismatic platelets and star-like aggregates. Prismatic crystals have following forms: {100}, {010}, and {001}, rhombic prisms are minor.
Twinning:
The simple (in 90°) and complex (in 90°, 45° and 60°) twinning is common.
X-Ray Powder Diffraction Data:
d-spacingIntensity
2.71 (50)
2.68 (100)
1.940 (80)
1.842 (50)
1.582 (50)
1.559 (50)
1.337 (50)
1.170 (60)

Optical Data of Shulamitite

Type:
Anisotropic
Anisotropism:
Weak
Bireflectance:
Weak
Reflectivity:
400nmR1=14.6%R2= 13.4%
420nmR1=13.6%R2= 12.5%
440nmR1=13.3%R2= 12.2%
460nmR1=12.9%R2= 11.9%
480nmR1=12.5%R2= 11.6%
500nmR1=12.6%R2= 11.6%
520nmR1=12.3%R2= 11.4%
540nmR1=12.2%R2= 11.4%
560nmR1=13.1%R2= 12.2%
580nmR1=12.5%R2= 11.7%
600nmR1=12.2%R2= 11.6%
620nmR1=12.2%R2= 11.5%
640nmR1=12.3%R2= 11.5%
660nmR1=12.3%R2= 11.4%
680nmR1=11.9%R2= 11.3%
700nmR1=11.7%R2= 11.2%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 14.6%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Grey to light grey
Internal Reflections:
Yellow-brown
Pleochroism:
Visible
Comments:
In thin section from reddish brown to yellow-brown, under reflected light from grey to light grey.

Chemical Properties of Shulamitite

Formula:
Ca3TiFe3+AlO8
Essential elements:
All elements listed in formula:
Analytical Data:
Average of 20 electron-microprobe analyses. Sample from the Hatrurim Formation, Israel.
SiO2 (0.80)
TiO2 (20.39)
ZrO2 (0.49)
Cr2O3 (0.30)
Al2O3 (8.82)
Fe2O3 (25.04)
FeO (0.11)
MgO (0.22)
CaO (43.75)
Total (99.92)
Empirical Formula:
Ca3.021(Ti0.988Zr0.015)(Fe3+0.934Mg0.021Cr0.015Fe2+0.006)(Al0.669Fe3+0.279Si0.052)O8

Other Names for Shulamitite

Name in Other Languages:
German:Shulamitit

Other Information

Other Information:
Shulamitite is weakly resistant to weathering or retrograde alteration, sometimes transforming into a hydrated phase CaTiFe3+AlO8.2-3H2O.
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 Shulamitite

Reference List:
GRENIER, J.-C., J. DARRIET, M. POUCHARD & P. HAGENMULLER (1976): Mise en evidence d’une nouvelle famille de phases de type perovskite lacunaire ordonnée de formule A3M3O8 (AMO2.67). Materials Research Bulletin 11, 1219-1226.

RODRÍGUEZ-CARVAJAL, J., M. VALETT-REGÍ & J. M. GONZÁLEZ-CALBET (1989): Perovskite threefold superlattices: a structure determination of the A3M3O8 phase. Materials Research Bulletin 24, 423-430.

Prasanna, T. R. S.; Navrotsky, A.. (1994): Energetics in the brownmillerite-perovskite pseudobinary Ca2Fe2O5-CaTiO3. Journal of Materials Research 9, 3121-3124.

Sharygin, V.V., Sokol, E.V. & Vapnik, Ye. (2008): Minerals of the pseudobinary perovskite-brownmillerite series from combustion metamorphic larnite rocks of the Hatrurim Formation (Israel). Russian Geology and Geophysics 49, 709-726.

Kolitsch, U. & Brandstätter, F. (2011): 1709) Srebrodolskit und die Phase Ca3Ti(Fe,Al)2O8 in einem Ca-reichen Xenolith aus dem Basaltbruch Klöch, Bad Radkersburg, Steiermark. Pp. 174-175 in Niedermayr, G. et al. (2011): Neue Mineralfunde aus Österreich LX. Carinthia II, 201./121., 135-186.

Sharygin, V.V., Lazic, B., Armbruster, T., Murashko, M.N., Wirth, R., Galuskina, I.O., Galuskin, E.V. and Vapnik, Y. (2011): Shulamitite, IMA 2011-016. CNMNC Newsletter No. 10, October 2011, 2552.

Sharygin, V.V., Lazic, B., Armbruster, T.M., Murashko, M.N., Wirth, R., Galuskina, I.O., Galuskin, E.V., Vapnik, Y., Britvin, S.N. & Logvinova, A.M. (2013): Shulamitite, Ca3TiFe3+AlO8 - a new perovskite-related mineral from Hatrurim Basin, Israel. European Journal of Mineralogy, 25, 97-111.

Internet Links for Shulamitite

Localities for Shulamitite

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.
Austria
 
  • Styria
    • Bad Radkersburg
      • Klöch
Kolitsch, U. & Brandstätter, F. (2011): 1709) Srebrodolskit und die Phase Ca3Ti(Fe,Al)2O8 in einem Ca-reichen Xenolith aus dem Basaltbruch Klöch, Bad Radkersburg, Steiermark. Pp. 174-175 in Niedermayr, G. et al. (2011): Neue Mineralfunde aus Österreich LX. Carinthia II, 201./121., 135-186.; Postl, W., Bernhard, F., Bojar, H.-P., Kolitsch, U. & Brandstätter, F. (2012): 1775) Magnesiochromit, Phillipsit-Ca, Chabasit-Ca und Vertumnit sowie eine Ergänzung zur Phase Ca3Ti(Fe,Al)2O8 (= Shulamitit) in einem Ca-reichen Xenolith aus dem Basaltsteinbruch in Klöch, Steiermark. Pp. 172-174 in Niedermayr, G. et al. (2012): Neue Mineralfunde aus Österreich LXI. Carinthia II, 202./122., 123-180.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Mayen
        • Ettringen
          • Bellerberg volcano
EMPA data, Sharygin V.V.
Israel (TL)
 
  • Negev
Sharygin, V.V., Sokol, E.V. & Vapnik, Ye. (2008): Minerals of the pseudobinary perovskite-brownmillerite series from combustion metamorphic larnite rocks of the Hatrurim Formation (Israel). Russian Geology and Geophysics 49, 709-726; Sharygin, V.V., Lazic, B., Armbruster, T., Murashko, M.N., Wirth, R., Galuskina, I.O., Galuskin, E.V. and Vapnik, Y. (2011): Shulamitite, IMA 2011-016. CNMNC Newsletter No. 10, October 2011, 2552.
Palestine
 
  • West Bank
    • Hatrurim Formation
Galuskin, E.V., Gfeller, F., Armbruster, T., Sharygin, V.V., Galuskina, I.O., Krivovichev, S.V., Vapnik, Y., Murashko, M., Dzierżanowski, P., Wirth, R. (2015): Mayenite supergroup, part III: Fluormayenite, Ca12Al14O32[□4F2], and fluorkyuygenite, Ca12Al14O32[(H2O)4F2], two new minerals from pyrometamorphic rocks of the Hatrurim Complex, South Levant. European Journal of Mineralogy, 27, 123-136.
Mineral and/or Locality  
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