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Sinjarite

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Formula:
CaCl2 · 2H2O
System:
Tetragonal
Colour:
Pale pink
Hardness:
Name:
Named after its discovery locality
Strongly hygroscopic.

Classification of Sinjarite

Approved
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
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Type Occurrence of Sinjarite

Year of Discovery:
1980
Geological Setting of Type Material:
Braided wadi filling in area of limestones

Physical Properties of Sinjarite

Vitreous, Resinous
Colour:
Pale pink
Hardness (Mohs):
Cleavage:
Very Good
Well developed prismatic
Density:
1.66 g/cm3 (Measured)    

Crystallography of Sinjarite

Crystal System:
Tetragonal
Morphology:
Elongated prismatic crystals

Optical Data of Sinjarite

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 Sinjarite

Formula:
CaCl2 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Sinjarite to other Species

3.BB.05EriochalciteCuCl2 · 2H2O
3.BB.10RokühniteFeCl2 · 2H2O
3.BB.15BischofiteMgCl2 · 6H2O
3.BB.20NickelbischofiteNiCl2 · 6H2O
3.BB.30AntarcticiteCaCl2 · 6H2O
3.BB.35TachyhydriteCaMg2Cl6 · 12H2O
8.4.1SellaiteMgF2
8.4.2NeighboriteNaMgF3
8.4.3BischofiteMgCl2 · 6H2O
8.4.4KorshunovskiteMg2Cl(OH)3 · 4H2O
8.4.5CarnalliteKMgCl3 · 6H2O
8.4.6TachyhydriteCaMg2Cl6 · 12H2O
8.4.7FluoriteCaF2
8.4.9AntarcticiteCaCl2 · 6H2O
8.4.10ChlorocalciteKCaCl3
8.4.11RorisiteCaFCl
8.4.12JarliteNa(Sr,Na)7MgAl6F32(OH,H2O)2
8.4.13CalcjarliteNa(Ca,Sr)3Al3(OH)2F14
8.4.14TikhonenkoviteSr[AlF4(OH)(H2O)]
8.4.15AcuminiteSr[AlF4(OH)(H2O)]
8.4.16FrankdicksoniteBaF2
8.4.17UsoviteBa2CaMgAl2F14
8.4.18BøgvaditeNa2SrBa2Al4F20

Other Names for Sinjarite

Name in Other Languages:

Other Information

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 Sinjarite

Reference List:
American Mineralogist (1980): 65: 1069.

Mineralogical Magazine: 43: 643-645.

Internet Links for Sinjarite

Localities for Sinjarite

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.
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
Iraq (TL)
 
  • Ninawa province
    • Mosul
Min Mag 43 (1980), 643
Russia
 
  • Urals Region
    • Southern Urals
      • 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).
Mineral and/or Locality  
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