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Hashemite

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Formula:
Ba(Cr,S)O4
System:
Orthorhombic
Colour:
Brown
Hardness:
Member of:
Name:
For the Hashemite Kingdom of Jordan, where the type locality is located.
This page provides mineralogical data about Hashemite.

Classification of Hashemite

Approved 1978
7.FA.15

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

35 : ANHYDROUS CHROMATES
3 : AXO4
27.2.4

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

Place of Conservation of First Recorded Material:
Smithsonian Museum, Washington DC 146183
Year of Discovery:
1978
Geological Setting of First Recorded Material:
Phosphate carbonate rock.

Physical Properties of Hashemite

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

Crystallography of Hashemite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
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°
Max Birefringence:
δ = 0.014 - 0.025
Image 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)O4
Essential elements:
All elements listed in formula:
Empirical Formula:
BaCrO4

Relationship of Hashemite to other Species

Member of:
Other Members of Group:
27.2.1TarapacáiteK2[CrO4]
27.2.2LópeziteK2[Cr2O7]
27.2.3ChromatiteCa[CrO4]
27.2.5CrocoitePb(CrO4)
27.2.6PhoenicochroitePb2(CrO4)O
27.2.7SantanaitePb11(CrO4)O12
27.2.8IranitePb10Cu(CrO4)6(SiO4)2(OH)2
27.2.9HemihedritePb10Zn(CrO4)6(SiO4)2(F,OH)2

Other Names for Hashemite

Name in Other Languages:
German:Hashemit
Spanish:Hashemita

Other Information

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 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

Localities for Hashemite

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.
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.
Mineral and/or Locality  
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