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Sinjarite

Formula:
CaCl
 
2
·2H
 
2
O
System:TetragonalColour:Pale pink
Hardness:1½
Name:Named after its discovery locality
This page provides mineralogical data about Sinjarite.

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

Physical Properties of Sinjarite

Lustre:Vitreous, Resinous
Colour:Pale pink
Hardness (Mohs):1½

Crystallography of Sinjarite

Crystal System:Tetragonal

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
[(OH)
 
3
|Cl] · 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

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
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    Localities for Sinjarite

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