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Sinjarite

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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.


Hide all sections | Show all sections

Classification of SinjariteHide

Approved
First Published:
1980
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

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)    

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

Chemical Properties of SinjariteHide

Formula:
CaCl2 · 2H2O

Crystallography of SinjariteHide

Crystal System:
Tetragonal
Morphology:
Elongated prismatic crystals

Occurrences of SinjariteHide

Paragenetic Mode(s):
•  Evaporite

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 - Nickel-Strunz GroupingHide

3.BB.05EriochalciteCuCl2 · 2H2OOrth. mmm (2/m 2/m 2/m)
3.BB.10RokühniteFeCl2 · 2H2OMon.
3.BB.15BischofiteMgCl2 · 6H2OMon. 2/m : B2/m
3.BB.20NickelbischofiteNiCl2 · 6H2OMon.
3.BB.30AntarcticiteCaCl2 · 6H2OTrig. 3 2 : P3 2 1
3.BB.35TachyhydriteCaMg2Cl6 · 12H2OTrig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.4.1SellaiteMgF2Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
8.4.2NeighboriteNaMgF3Orth. mmm (2/m 2/m 2/m)
8.4.3BischofiteMgCl2 · 6H2OMon. 2/m : B2/m
8.4.4KorshunovskiteMg2Cl(OH)3 · 4H2OTric.
8.4.5CarnalliteKMgCl3 · 6H2OOrth. mmm (2/m 2/m 2/m) : Pnna
8.4.6TachyhydriteCaMg2Cl6 · 12H2OTrig.
8.4.7FluoriteCaF2Iso. m3m (4/m 3 2/m) : Fm3m
8.4.9AntarcticiteCaCl2 · 6H2OTrig. 3 2 : P3 2 1
8.4.10ChlorocalciteKCaCl3Orth. mmm (2/m 2/m 2/m) : Pnma
8.4.11RorisiteCaFClTet.
8.4.12JarliteNa(Sr,Na)7MgAl6F32(OH,H2O)2Mon. 2/m
8.4.13CalcjarliteNa(Ca,Sr)3Al3(OH)2F14Mon.
8.4.14TikhonenkoviteSr[AlF4(OH)(H2O)]Mon. 2/m : P21/b
8.4.15AcuminiteSr[AlF4(OH)(H2O)]Mon. 2/m : B2/b
8.4.16FrankdicksoniteBaF2Iso. m3m (4/m 3 2/m) : Fm3m
8.4.17UsoviteBa2CaMgAl2F14Mon.
8.4.18BøgvaditeNa2SrBa2Al4F20Mon. 2/m

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.

References for SinjariteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Leclaire, A., Borel, M.M. (1977) Le dichlorure de calcium dihydraté. Acta Crystallographica: B33: 1608-1610.
Aljubouri, Z.A., Aldabbagh, S.M. (1980) Sinjarite, a new mineral from Iraq. Mineralogical Magazine: 43: 643-645.
Fleischer, M., Cabri, L.J., Chao, G.Y., Pabst, A. (1980) New mineral names. American Mineralogist: 65: 1065-1070.

Internet Links 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 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.
Azerbaijan
 
  • Qobustan District (Gobustan; Kobustan)
    • Caspian Sea
Novgorodova M.I., Mamedov Yu.G.. Native aluminium from mud volcano at the Bulla island (caspian Sea), - Lithology and Mineral Resourses,1996,N4,p. 339-349
Czech Republic
 
  • Ústí nad Labem Region
    • Děčín District
Varilová, Z., Prikryl, R., & Cílek, V. (2011). Erratum to: Pravcice Rock Arch (Bohemian Switzerland National Park, Czech Republic) deterioration due to natural and anthropogenic weathering. Environmental Earth Sciences, 64(4), 1191.
Iraq (TL)
 
  • Nineveh Governorate
    • Mosul
Aljubouri Z A, Aldabbagh S M (1980) Sinjarite, a new mineral from Iraq. Mineralogical Magazine 43, 643-645
Russia
 
  • Chelyabinsk Oblast
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
 
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