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Sinjarite

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Formula:
CaCl
 
2
 · 2H
 
2
O
System:TetragonalColour:Pale pink
Hardness:1½
Name:Named after its discovery locality


Strongly hygroscopic.

Classification of Sinjarite

IMA status:Approved
Strunz 8th edition ID:3/A.12-70
Nickel-Strunz 10th (pending) edition ID:3.BB.25

3 : HALIDES
B : Simple halides, with H2O
B : M:X = 1:2
Dana 8th edition ID:9.2.5.1

9 : NORMAL HALIDES
2 : AX2
Hey's CIM Ref.: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

Type Locality:Sinjar, Mosul, Ninawa province, Iraq
Year of Discovery:1980
Geological Setting of type material:Braided wadi filling in area of limestones

Physical Properties of Sinjarite

Lustre:Vitreous, Resinous
Colour:Pale pink
Hardness (Mohs):1½
Cleavage:Very Good
Well developed prismatic
Density (measured):1.66 g/cm3

Crystallography of Sinjarite

Crystal System:Tetragonal
Morphology:Elongated prismatic crystals

Optical Data of Sinjarite

Type:Uniaxial
RI values: nα = 1.540 nβ = 1.540
Maximum Birefringence:δ = 1.540

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Sinjarite

Formula:
CaCl
 
2
 · 2H
 
2
O
Essential elements:Ca, Cl, H, O
All elements listed in formula:Ca, Cl, H, O

Relationship of Sinjarite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.BB.05Eriochalcite
CuCl
 
2
 · 2H
 
2
O
3.BB.10Rokühnite
FeCl
 
2
 · 2H
 
2
O
3.BB.15Bischofite
MgCl
 
2
 · 6H
 
2
O
3.BB.20Nickelbischofite
NiCl
 
2
 · 6H
 
2
O
3.BB.30Antarcticite
CaCl
 
2
 · 6H
 
2
O
3.BB.35Tachyhydrite
CaMg
 
2
Cl
 
6
 · 12H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
8.4.1Sellaite
MgF
 
2
8.4.2Neighborite
NaMgF
 
3
8.4.3Bischofite
MgCl
 
2
 · 6H
 
2
O
8.4.4Korshunovskite
Mg
 
2
Cl(OH)
 
3
 · 4H
 
2
O
8.4.5Carnallite
KMgCl
 
3
 · 6H
 
2
O
8.4.6Tachyhydrite
CaMg
 
2
Cl
 
6
 · 12H
 
2
O
8.4.7Fluorite
CaF
 
2
8.4.9Antarcticite
CaCl
 
2
 · 6H
 
2
O
8.4.10Chlorocalcite
KCaCl
 
3
8.4.11Rorisite
CaFCl
8.4.12Jarlite
Na(Sr,Na)
 
7
MgAl
 
6
F
 
32
(OH,H
 
2
O)
 
2
8.4.13Calcjarlite
Na(Ca,Sr)
 
3
Al
 
3
(OH)
 
2
F
 
14
8.4.14Tikhonenkovite
Sr[AlF
 
4
(OH)(H
 
2
O)]
8.4.15Acuminite
Sr[AlF
 
4
(OH)(H
 
2
O)]
8.4.16Frankdicksonite
BaF
 
2
8.4.17Usovite
Ba
 
2
CaMgAl
 
2
F
 
14
8.4.18Bøgvadite
Na
 
2
SrBa
 
2
Al
 
4
F
 
20

Other Names for Sinjarite

Synonyms:
IMA1979-041
Other Languages:
German:Sinjarit
Russian:Синджарит
Spanish:Sinjarita

Other Information

Special Storage/
Display Requirements:		Extremely hydroscopic
Health Warning: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

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  • Raman and XRD data at RRUFF project [Link dead]
  • American Mineralogist Crystal Structure Database [Link dead]
  • Sinjarite details from Handbook of Mineralogy (PDF) [Link dead]
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    • Localities for Sinjarite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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 (Gobustan; Kobustan) District
      • 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
     
    • 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).
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