Hashemite Mineral Data

Hashemite Mineral Data +

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General Hashemite Information

Chemical Formula:

Ba(Cr,S)O4

Composition:

Molecular Weight = 248.34 gm

Barium 55.30 % Ba 61.74 % BaO

Chromium 15.70 % Cr 30.20 % CrO₃

Sulfur 3.23 % S 8.06 % SO₃

Oxygen 25.77 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaCr_0.75S_0.25O₄

IMA Status:

Approved IMA 1983

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 62181

PDF 35-642

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Hashemite Crystallography

Axial Ratios:

a:b:c =1.6467:1:1.3263

Cell Dimensions:

a = 9.1028, b = 5.5276, c = 7.3314, Z = 4; V = 368.89 Den(Calc)= 4.47

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.516(1), 3.171(0.8), 3.669(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

Physical Properties of Hashemite

Cleavage:

[???] Good

Color:

Brown, Greenish brown, Yellow brown, Light yellow brown, Dark greenish brow.

Density:

4.59

Diaphaniety:

Transparent to Translucent

Hardness:

3.5 - Copper Penny

Luster:

Adamantine

Streak:

brownish white

Optical Properties of Hashemite

Gladstone-Dale:

CI meas= -0.079 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.108 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2154,KPDmeas= 0.2098,KC= 0.1945

Optical Data:

Biaxial (+), a=1.952, b=1.96, g=1.977, bire=0.0250, 2V(Calc)=70, 2V(Meas)=35-57.

Calculated Properties of Hashemite

Electron Density:

r_electron=4.07 gm/cc
note: r_Hashemite=4.59 gm/cc.

Fermion Index

Fermion Index = 0.11383
Boson Index = 0.88617

Photoelectric:

PE_Hashemite= 254.29 barns/electron
U=PE_Hashemite x r_electron=1,034.00 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hashemite is Not Radioactive

Hashemite Classification

Dana Class:

35.3.3.1 (35)Anhydrous Chromates

(35.3)where A+ XO4

(35.3.3)Dana Group

35.3.3.1 Hashemite Ba(Cr,S)O4 P nma 2/m 2/m 2/m

Strunz Class:

VI/A.09-30 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/A - Waterfree sulfates [SO4]2- without unfamiliar anions. Cations of very big size

VI/A.09 - Barite group

VI/A.09-10 Celestine SrSO4 Pbnm 2/m 2/m 2/m

VI/A.09-20 Barite BaSO4 Pbnm 2/m 2/m 2/m

VI/A.09-30 Hashemite Ba(Cr,S)O4 P nma 2/m 2/m 2/m

VI/A.09-40 Kerstenite* PbSeO4(?) P nma 2/m 2/m 2/m

VI/A.09-50 Anglesite PbSO4 Pbnm 2/m 2/m 2/m

Other Hashemite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Hashemite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Hashemite

Ba(Cr,S)O4
Dana No: 35.3.3.1 Strunz No: VI/A.09-30
Locality:

Notes: