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Hashemite

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Flag of Jordan
Formula:
BaCr6+O4
System:
Orthorhombic
Colour:
Brown
Lustre:
Adamantine
Hardness:
Member of:
Name:
Named by Phoebe L. Hauff, Eugene E. Foord, Sam Rosenblum, and Walid Hakki for the Hashemite Kingdom of Jordan (the official name of Jordan), where the type locality is located.
Ba-analogue of tarapacáite. Stoichiometrically related to crocoite and chromatite. One of three minerals with essential Ba and Cr, by hawthorneite and redledgeite.


Classification of Hashemite

Approved
Approval Year:
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

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)

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

IMA Formula:
BaCr6+O4
Elements listed in formula:

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.

Type Occurrence of Hashemite

Place of Conservation of Type Material:
Smithsonian Museum, Washington DC 146183
Geological Setting of Type Material:
Phosphate carbonate rock.
Empirical Formula:
BaCrO4

Relationship of Hashemite to other Species

Member of:
Other Members of Group:
27.2.1TarapacáiteK2CrO4
27.2.2LópeziteK2Cr2O7
27.2.3ChromatiteCaCr6+O4
27.2.5CrocoitePbCrO4
27.2.6PhoenicochroitePb2O(CrO4)
27.2.7SantanaitePb11CrO16
27.2.8IranitePb10Cu(CrO4)6(SiO4)2(OH)2
27.2.9HemihedritePb10Zn(CrO4)6(SiO4)2F2

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:
Hauff, P.L., Foord, E.E., Rosenblum, S., Hakki, W. (1983) Hashemite, Ba(Cr,S)O4, a new mineral from Jordan. American Mineralogist: 68: 1223-1225.

Duesler, E.N., Foord, E.E. (1986) Crystal structure of hashemite, BaCrO4, a barite structure type. American Mineralogist: 71: 1217-1220.

Pasero, M., Davoli, P. (1987) Structure of hashemite, Ba(Cr,S)O4. Acta Crystallographica C: 43: 1467-1469.

Internet Links for Hashemite

mindat.org URL:
http://www.mindat.org/min-1823.html
Please feel free to link to this page.

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
Pitty, A. F., & Alexander, W. R. (2010). A natural analogue study of cement buffered, hyperalkaline groundwaters and their interaction with a repository host rock IV: an examination of the Khushaym Matruk (central Jordan) and Maqarin (northern Jordan) sites. NDA-RWMD Technical Report, NDA, Moors Row, UK.
    • Hashem region
Amer.Min.(1983) 68, 1223-1225
  • Irbid
Khoury, H. N., Salameh, E., & Abdul-Jaber, Q. (1985). Characteristics of an unusual highly alkaline water from the Maqarin area, northern Jordan. Journal of Hydrology, 81(1), 79-91.
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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