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Shulamitite

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Hatrurim (Hatrurim Basin), Negev, Israel

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Formula:
Ca
 
3
TiFe
3+
 
AlO
 
8
System:OrthorhombicColour: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

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

Type Locality:Hatrurim (Hatrurim Basin), Negev, Israel
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.
Associated Minerals at type locality:
LarniteMayeniteSpinelYe'elimiteFluorapatite
MagnesioferritePortlanditeHematiteHillebranditeAfwillite
FoshagiteKatoite

Physical Properties of Shulamitite

Lustre: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 (calculated):3.84 g/cm3
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 {P21/m 2/m 2/a}
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:
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%


Graph shows reflectance levels at different wavelengths (in nm). 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:
Ca
 
3
TiFe
3+
 
AlO
 
8
Essential elements:Al, Ca, Fe, O, Ti
All elements listed in formula:Al, Ca, Fe, O, Ti
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:
Ca
 
3.021
(Ti
 
0.988
Zr
 
0.015
)(Fe
3+
0.934
Mg
 
0.021
Cr
 
0.015
Fe
2+
0.006
)(Al
 
0.669
Fe
3+
0.279
Si
 
0.052
)O
 
8

Other Names for Shulamitite

Synonyms:
IMA2011-016Unnamed (Ca-Ti-Fe-Al Oxide)
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 Warning: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

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    • Localities for Shulamitite

    The 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.
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    (TL) indicates type locality. ? 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
     
    • 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.
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