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Sinjarite

A valid IMA mineral species
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About SinjariteHide

03491070015704005684932.jpg
Sinjar, Iraq
Formula:
CaCl2 · 2H2O
Colour:
Pale pink
Lustre:
Vitreous, Resinous
Hardness:
Specific Gravity:
1.66
Crystal System:
Tetragonal
Name:
Named after the Sinjar Wadi, Iraq, its discovery locality. It is pronounced sĭ·njārait.
Strongly hygroscopic.


Unique IdentifiersHide

Mindat ID:
3673
Long-form identifier:
mindat:1:1:3673:9
GUID
(UUID V4):
b58f942d-f3e8-4f80-886d-f7c72c55ddc3

IMA Classification of SinjariteHide

Classification of SinjariteHide

3.BB.25

3 : HALIDES
B : Simple halides, with H2O
B : M:X = 1:2
9.2.5.1

9 : NORMAL HALIDES
2 : AX2
8.4.8

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
4 : Halides of the alkaline earths and Mg

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
SnjIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of SinjariteHide

Vitreous, Resinous
Transparency:
Translucent
Colour:
Pale pink
Hardness:
1½ on Mohs scale
Cleavage:
Very Good
Well developed prismatic
Density:
1.66 g/cm3 (Measured)    1.60 g/cm3 (Calculated)

Optical Data of SinjariteHide

Type:
Uniaxial
RI values:
nα = 1.540 nβ = 1.540
Max Birefringence:
δ = 1.540
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemistry of SinjariteHide

Mindat Formula:
CaCl2 · 2H2O

Crystallography of SinjariteHide

Crystal System:
Tetragonal
Cell Parameters:
a = 7.21 Å, c = 5.86 Å
Ratio:
a:c = 1 : 0.813
Unit Cell V:
304.63 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Elongated prismatic crystals
Comment:
Point Group: n.d.; Space Group: n.d. (synthetic).

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009590SinjariteLeclaire A, Borel M M (1977) Le dichlorure de calcium dihydrate Acta Crystallographica B33 1608-16101977synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.82 Å(100)
3.04 Å(99)
6.09 Å(86)
2.96 Å(71)
2.73 Å(71)
3.06 Å(66)
2.36 Å(51)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
25 : Evaporites (prebiotic)
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
50 : Coal and/or oil shale minerals<0.36
Stage 10b: Anthropogenic minerals<10 Ka
54 : Coal and other mine fire minerals (see also #51 and #56)

Type Occurrence of SinjariteHide

Place of Conservation of Type Material:
Museum of Natural History, University of Mosul.
Geological Setting of Type Material:
Braided wadi filling in area of limestones
Reference:
Aljubouri, Z.A., Aldabbagh, S.M. (1980) Sinjarite, a new mineral from Iraq. Mineralogical Magazine: 43: 643-645.

Synonyms of SinjariteHide

Other Language Names for SinjariteHide

Related Minerals - Strunz-mindat GroupingHide

3.BB.05EriochalciteCuCl2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pmna
3.BB.10RokühniteFeCl2 · 2H2OMon.
3.BB.15BischofiteMgCl2 · 6H2OMon. 2/m : B2/m
3.BB.20NickelbischofiteNiCl2 · 6H2OMon. 2/m
3.BB.30AntarcticiteCaCl2 · 6H2OTrig. 3 2 : P3 2 1
3.BB.35AravaipaitePb3AlF9 · H2OTric. 1 : P1
3.BB.35TachyhydriteCaMg2Cl6 · 12H2OTrig. 3 : R3
3.BB.40GhiaraiteCaCl2 · 4H2OTric. 1 : P1

Other InformationHide

Special Storage/
Display Requirements:
Extremely hydroscopic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for SinjariteHide

References for SinjariteHide

Localities for SinjariteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Azerbaijan
 
  • Baku City
Novgorodova M.I. (caspian Sea)
Czech Republic
 
  • Ústí nad Labem Region
    • Děčín District
Varilová et al. (2011)
Iraq (TL)
 
  • Nineveh Governorate
    • Sinjar District
Aljubouri Z A (1980)
Russia
 
  • Chelyabinsk Oblast
Cesnokov et al. (1998)
 
Mineral and/or Locality  
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