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Hashemite

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Big Photo

Hatrurim Formation, Negev, Israel
© Vincent Bourgoin

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Formula:
Ba(Cr,S)O
 
4
System:OrthorhombicColour:Brown
Hardness:3½
Member of:Baryte Group
Name:For the Hashemite Kingdom of Jordan, where the type locality is located.
This page provides mineralogical data about Hashemite.

Classification of Hashemite

IMA status:Approved 1978
Strunz 8th edition ID:6/A.09-30
Nickel-Strunz 10th (pending) edition ID:7.FA.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
A : Without additional anions
Dana 7th edition ID:35.3.3.1
Dana 8th edition ID:35.3.3.1

35 : ANHYDROUS CHROMATES
3 : AXO4
Hey's CIM Ref.:27.2.4

27 : Sulphites, Chromates, Molybdates and Tungstates
2 : Chromates
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Type Occurrence of Hashemite

Type Locality:Lisdan-Siwaga Fault, Hashem region, Amman, Jordan
Place of Conservation of Type Material:Smithsonian Museum, Washington DC 146183
Year of Discovery:1978
Geological Setting of type material:Phosphate carbonate rock.

Physical Properties of Hashemite

Lustre:Adamantine
Diaphaneity (Transparency):Translucent
Colour:Brown
Comment:Commonly zoned from cores of dark grrenish brown to pale yellow brown.
Hardness (Mohs):3½
Cleavage:Perfect
Perfect {001}
Good {010} {100}
Density (measured):4.54 - 4.59 g/cm3
Density (calculated):4.49(3) g/cm3

Crystallography of Hashemite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnma {P21/n 21/m 21/a}
Cell Parameters:a = 9.1028(14) Å, b = 5.5276(7) Å, c = 7.3314(11) Å
Ratio:a:b:c = 1.647 : 1 : 1.326
Unit Cell Volume:V 368.89 ų (Calculated from Unit Cell)
Z:4
Morphology:Stubby, doubly terminated to tabular crystals.

Optical Data of Hashemite

Type:Biaxial (+)
RI values: nα = 1.810 - 1.952 nβ = 1.813 - 1.960 nγ = 1.824 - 1.977
2V:Measured: 35° to 57°, Calculated: 55° to 69°
Maximum Birefringence:δ = 0.014 - 0.025

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:very strong r

Chemical Properties of Hashemite

Formula:
Ba(Cr,S)O
 
4
Essential elements:Ba, Cr, O
All elements listed in formula:Ba, Cr, O, S
Empirical Formula:
BaCrO
 
4

Relationship of Hashemite to other Species

Member of:Baryte Group
Other Members of Group:

- +
Anglesite
PbSO
 
4
Baryte
BaSO
 
4
Celestine
SrSO
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
7.FA.05Tarapacáite
K
 
2
[CrO
 
4
]
7.FA.10Chromatite
Ca[CrO
 
4
]
7.FA.20Crocoite
Pb(CrO
 
4
)
Related Minerals - Hey's Index Grouping:

- +
27.2.1Tarapacáite
K
 
2
[CrO
 
4
]
27.2.2Lópezite
K
 
2
[Cr
 
2
O
 
7
]
27.2.3Chromatite
Ca[CrO
 
4
]
27.2.5Crocoite
Pb(CrO
 
4
)
27.2.6Phoenicochroite
Pb
 
2
(CrO
 
4
)O
27.2.7Santanaite
Pb
 
11
(CrO
 
4
)O
 
12
27.2.8Iranite
Pb
 
10
Cu(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2
27.2.9Hemihedrite
Pb
 
10
Zn(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2

Other Names for Hashemite

Synonyms:
IMA1978-006
Other Languages:
German:Hashemit
Russian:Хашимит
Spanish:Hashemita

Other Information

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 Hashemite

Reference List:

- +
American Mineralogist: 68: 1223-1225.

American Mineralogist: 71: 1217-1220.

Pasero M. & Davoli P.(1987): Structure of hashemite, Ba(Cr,S)O4. Acta Crystallogr., C43, 1467-1469.

Internet Links for Hashemite

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    • Localities for Hashemite

    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.
    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.
    Vapnik, Y., Sokol, E., Murashko M., Sharygin V. (2006): The enigma of Hatrurim. Mineralogical Almanac, 10, 69-77.
    Jordan
     
    • Amman
      • Hashem region
    		Amer.Min.(1983) 68, 1223-1225
    Palestine
     
    • West Bank
      • Hatrurim formation
    		Mikhail N. Murashko analytical data
    Ella V. Sokol, Olga L. Gaskova, Svetlana N. Kokh, Olga A. Kozmenko, Yuri V. Seryotkin, Yevgeny Vapnik, and Michail N. Murashko (2011): Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert. American Mineralogist, 96, 659-674.
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