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Hashemite

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Flag of Jordan
Formula:
Ba(CrO4)
Colour:
Brown
Lustre:
Adamantine
Hardness:
Specific Gravity:
4.54 - 4.59
Crystal System:
Orthorhombic
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.


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Classification of HashemiteHide

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

Pronounciation of HashemiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of HashemiteHide

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

Optical Data of HashemiteHide

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 HashemiteHide

Formula:
Ba(CrO4)
IMA Formula:
BaCr6+O4

Crystallography of HashemiteHide

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 V:
368.89 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Stubby, doubly terminated to tabular crystals.

Type Occurrence of HashemiteHide

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

Synonyms of HashemiteHide

Other Language Names for HashemiteHide

German:Hashemit
Spanish:Hashemita

Relationship of Hashemite to other SpeciesHide

Member of:
Other Members of this group:
AnglesitePbSO4Orth. mmm (2/m 2/m 2/m) : Pnma
CelestineSrSO4Orth. mmm (2/m 2/m 2/m) : Pnma
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ettringite1 photo of Hashemite associated with Ettringite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.FA.05TarapacáiteK2(CrO4)Orth. mmm (2/m 2/m 2/m)
7.FA.10ChromatiteCaCr6+O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.FA.20CrocoitePb(CrO4)Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.2.1TarapacáiteK2(CrO4)Orth. mmm (2/m 2/m 2/m)
27.2.2LópeziteK2Cr2O7Tric. 1 : P1
27.2.3ChromatiteCaCr6+O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
27.2.5CrocoitePb(CrO4)Mon. 2/m : P21/b
27.2.6PhoenicochroitePb2(CrO4)OMon.
27.2.7SantanaitePb11(CrO4)O12Hex. 6 2 2 : P63 2 2
27.2.8IranitePb10Cu(CrO4)6(SiO4)2(OH)2Tric.
27.2.9HemihedritePb10Zn(CrO4)6(SiO4)2(OH)2Tric.

Other InformationHide

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 HashemiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 HashemiteHide

Localities for HashemiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Israel
 
  • Negev
Vapnik, Y., Sokol, E., Murashko M., Sharygin V. (2006): The enigma of Hatrurim. Mineralogical Almanac, 10, 69-77.
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.
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
    • Maqarin area
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
Sokol, E.V., Gaskova, O.L., Kokh, S.N., Kozmenko, O.A., Seryotkin, Y.V., Vapnik, Y., Murashko, M.N. (2011): Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert. American Mineralogist 96, 659-674.
Sokol, E.V., Gaskova, O.L., Kokh, S.N., Kozmenko, O.A., Seryotkin, Y.V., Vapnik, Y., Murashko, M.N. (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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