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Baghdadite

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Big Photo

Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi City, Okayama Prefecture, Chugoku Region, Honshu Island, Japan
© Knut Eldjarn

Show Baghdadite Photos (3)



Formula:
Ca
 
3
(Zr,Ti)(Si
 
2
O
 
7
)O
 
2
System:MonoclinicColour:Colourless
Lustre:VitreousHardness:6
Member of:Wöhlerite Group
Name:Named after Baghdad, the capital of Iraq, within which country lies the type locality.


Wöhlerite Group.

Classification of Baghdadite

IMA status:Approved
Strunz 8th edition ID:8/C.11-30
Nickel-Strunz 10th (pending) edition ID:9.BE.17

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
Dana 8th edition ID:56.2.4.1

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Hey's CIM Ref.:14.10.25

14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf
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Type Occurrence of Baghdadite

Type Locality:Dupezeh Mt., Hero, Qala-Diz (Qala-Dizeh; Qala-Diza), Iraq
Year of Discovery:1986

Physical Properties of Baghdadite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless
Streak:White
Hardness (Mohs):6

Crystallography of Baghdadite

Crystal System:Monoclinic
Cell Parameters:a = 10.42Å, b = 10.16Å, c = 7.36Å
β = 91.1°
Ratio:a:b:c = 1.026 : 1 : 0.724
Unit Cell Volume:V 779.04 ų (Calculated from Unit Cell)

Optical Data of Baghdadite

Type:Biaxial (+)
RI values: nα = 1.652 nβ = 1.658 nγ = 1.670
2V:Measured: 72° , Calculated: 72°
Maximum Birefringence:δ = 0.018

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

Chemical Properties of Baghdadite

Formula:
Ca
 
3
(Zr,Ti)(Si
 
2
O
 
7
)O
 
2
Essential elements:Ca, O, Si, Zr
All elements listed in formula:Ca, O, Si, Ti, Zr
Common Impurities:Al,Fe,Mg,Na

Relationship of Baghdadite to other Species

Member of:Wöhlerite Group
Other Members of Group:

- +
Burpalite
Na
 
2
CaZr(Si
 
2
O
 
7
)F
 
2
Cuspidine
Ca
 
4
(Si
 
2
O
 
7
)(F,OH)
 
2
Hiortdahlite
(Ca,Na)
 
3
(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
Janhaugite
(Na,Ca)
 
3
(Mn
2+
 
,Fe
2+
 
)
 
3
(Ti,Zr,Nb)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH,F)
 
2
Låvenite
(Na,Ca)
 
2
(Mn
2+
 
,Fe
2+
 
)(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
Niocalite
(Ca,Nb)
 
4
(Si
 
2
O
 
7
)(O,OH,F)
 
2
Normandite
NaCa(Mn,Fe)(Ti,Nb,Zr)(Si
 
2
O
 
7
)OF
Wöhlerite
NaCa
 
2
(Zr,Nb)(Si
 
2
O
 
7
)(O,OH,F)
 
2
Related Minerals - Nickel-Strunz Grouping):

- +
9.BE.02Wadsleyite
(Mg,Fe
2+
 
)
 
2
(SiO
 
4
)
9.BE.05Hennomartinite
SrMn
3+
2
(Si
 
2
O
 
7
)(OH)
 
2
 · H
 
2
O
9.BE.05Lawsonite
CaAl
 
2
(Si
 
2
O
 
7
)(OH)
 
2
 · H
 
2
O
9.BE.05Noelbensonite
BaMn
3+
2
(Si
 
2
O
 
7
)(OH)
 
2
 · H
 
2
O
9.BE.05Itoigawaite
SrAl
 
2
(Si
 
2
O
 
7
)(OH)
 
2
 · H
 
2
O
9.BE.07Ilvaite
CaFe
2+
2
Fe
3+
 
(Si
 
2
O
 
7
)O(OH)
9.BE.07Manganilvaite
Ca(Mn
2+
 
,Fe
2+
 
)
 
2
Fe
3+
 
(Si
 
2
O
 
7
)O(OH)
9.BE.10Suolunite
Ca
 
2
(H
 
2
Si
 
2
O
 
7
) · H
 
2
O
9.BE.12Jaffeite
Ca
 
6
(Si
 
2
O
 
7
)(OH)
 
6
9.BE.15Fresnoite
Ba
 
2
Ti(Si
 
2
O
 
7
)O
9.BE.17Burpalite
Na
 
2
CaZr(Si
 
2
O
 
7
)F
 
2
9.BE.17Cuspidine
Ca
 
4
(Si
 
2
O
 
7
)(F,OH)
 
2
9.BE.17Hiortdahlite
(Ca,Na)
 
3
(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
9.BE.17Janhaugite
(Na,Ca)
 
3
(Mn
2+
 
,Fe
2+
 
)
 
3
(Ti,Zr,Nb)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH,F)
 
2
9.BE.17Låvenite
(Na,Ca)
 
2
(Mn
2+
 
,Fe
2+
 
)(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
9.BE.17Niocalite
(Ca,Nb)
 
4
(Si
 
2
O
 
7
)(O,OH,F)
 
2
9.BE.17Normandite
NaCa(Mn,Fe)(Ti,Nb,Zr)(Si
 
2
O
 
7
)OF
9.BE.17Wöhlerite
NaCa
 
2
(Zr,Nb)(Si
 
2
O
 
7
)(O,OH,F)
 
2
9.BE.17Hiortdahlite I
Na
 
4
Ca
 
8
Zr
 
2
(Nb,Mn,Ti,Fe,Mg,Al)
 
2
(Si
 
2
O
 
7
)
 
4
O
 
3
F
 
5
9.BE.17Marianoite
Na
 
2
Ca
 
4
(Nb,Zr)
 
2
(Si
 
2
O
 
7
)
 
2
(O,F)
 
4
9.BE.20Mosandrite
(◻,Ca,Na)
 
3
(Ca,REE)
 
4
Ti(Si
 
2
O
 
7
)
 
2
[H
 
2
O,OH,F]
 
4
 · H
 
2
O
9.BE.20Nacareniobsite-(Ce)
Na
 
3
Ca
 
3
(Ce,La,Nd)Nb(Si
 
2
O
 
7
)
 
2
OF
 
3
9.BE.22Götzenite
Na
 
2
Ca
 
5
Ti(Si
 
2
O
 
7
)
 
2
F
 
4
9.BE.22Hainite
Na
 
4
Ca
 
8
(Ti,Zr,Mn)
 
3
(Si
 
2
O
 
7
)
 
4
F
 
4
9.BE.22Rosenbuschite
(Ca,Na)
 
3
(Zr,Ti)(Si
 
2
O
 
7
)OF
9.BE.22Kochite
(Na,Ca)
 
3
Ca
 
2
(Mn,Ca)ZrTi(Si
 
2
O
 
7
)
 
2
(F,O)
 
4
9.BE.23Dovyrenite
Ca
 
6
Zr(Si
 
2
O
 
7
)
 
2
(OH)
 
4
9.BE.25Barytolamprophyllite
(Ba,Na)
 
2
(Na,Ti,Fe
3+
 
)
 
4
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O(OH,F)
9.BE.25Ericssonite
BaMn
2+
2
Fe
3+
 
(Si
 
2
O
 
7
)O(OH)
9.BE.25Lamprophyllite
(Sr,K,Ba)
 
2
(Na,Ti,Mn
2+
 
,Fe
3+
 
)
 
4
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O(O,OH,F)
9.BE.25Ericssonite-2O
BaMn
2+
2
Fe
3+
 
(Si
 
2
O
 
7
)O(OH)
9.BE.25Seidozerite
Na
 
8
Mn
2+
2
Zr
 
3
Ti
 
3
(Si
 
2
O
 
7
)
 
4
O
 
4
F
 
4
9.BE.25Nabalamprophyllite
Na
 
3
(Ba,Na)
 
2
Ti
 
3
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH,F)
 
2
9.BE.25Grenmarite
(Zr,Mn)
 
2
(Zr,Ti)(Mn,Na)(Na,Ca)
 
4
(Si
 
2
O
 
7
)
 
2
(O,F)
 
4
9.BE.25Schüllerite
Ba
 
2
Na(Mn,Ca)(Fe
3+
 
,Mg,Fe
2+
 
)
 
2
Ti
 
2
(Si
 
2
O
 
7
)
 
2
(O,F)
 
4
9.BE.25Lileyite
Ba
 
2
(Na,Fe,Ca)
 
3
MgTi
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
F
 
2
9.BE.27Murmanite
Na
 
2
Ti
 
2
(Si
 
2
O
 
7
)O
 
2
 · 2H
 
2
O
9.BE.30Epistolite
Na
 
2
(Nb,Ti)
 
2
(Si
 
2
O
 
7
)O
 
2
 · nH
 
2
O
9.BE.32Lomonosovite
Na
 
5
Ti
 
2
(Si
 
2
O
 
7
)(PO
 
4
)O
 
2
9.BE.35Vuonnemite
Na
 
11
Ti
4+
 
Nb
 
2
(Si
 
2
O
 
7
)
 
2
(PO
 
4
)
 
2
O
 
3
(F,OH)
9.BE.37Sobolevite
Na
 
13
Ca
 
2
Mn
 
2
Ti
 
3
(Si
 
2
O
 
7
)
 
2
(PO
 
4
)
 
4
O
 
3
F
 
3
9.BE.40Innelite
Na
 
2
CaBa
 
4
Ti
 
3
(Si
 
2
O
 
7
)
 
2
(SO
 
4
)
 
2
O
 
4
9.BE.40Phosphoinnelite
Na
 
3
Ba
 
4
Ti
 
3
(Si
 
2
O
 
7
)
 
2
(PO
 
4
,SO
 
4
)
 
2
O
 
2
F
9.BE.42Yoshimuraite
Ba
 
2
Mn
 
2
Ti(Si
 
2
O
 
7
)(PO
 
4
)O(OH)
9.BE.45Quadruphite
Na
 
14
Ca
 
2
Ti
 
4
(Si
 
2
O
 
7
)
 
2
(PO
 
4
)
 
2
O
 
2
F
9.BE.47Polyphite
Na
 
5
(Na
 
4
Ca
 
2
)Ti
 
2
(Si
 
2
O
 
7
)(PO
 
4
)
 
3
O
 
2
F
 
2
9.BE.50Bornemanite
Na
 
6
BaTi
 
2
Nb(Si
 
2
O
 
7
)
 
2
(PO
 
4
)O
 
2
(OH)F
9.BE.50Shkatulkaite
Na
 
10
Mn
2+
 
Ti
 
3
Nb
 
3
(Si
 
2
O
 
7
)
 
6
(OH)
 
2
F · 12H
 
2
O
9.BE.55Bafertisite
Ba(Fe
3+
 
,Mn
2+
 
)
 
2
Ti(Si
 
2
O
 
7
)O(O,OH)
 
2
9.BE.55Hejtmanite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Ti(Si
 
2
O
 
7
)O(OH,F)
9.BE.55Bykovaite
(Ba,Na,K)
 
2
(Na,Ti,Mn)
 
4
(Ti,Nb)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(H
 
2
O,F,OH)
 
2
 · 3.5H
 
2
O
9.BE.55Nechelyustovite
(Ba,Sr,K)
 
2
(Na,Ti,Mn)
 
4
(Ti,Nb)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(O,H
 
2
O,F)
 
2
 · 4.5H
 
2
O
9.BE.60Delindeite
(Na,K)
 
2
(Ba,Ca)
 
2
(Ti,Fe,Al)
 
3
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH)
 
2
 · 2H
 
2
O
9.BE.65Bussenite
Na
 
2
Ba
 
2
Fe
2+
 
Ti(Si
 
2
O
 
7
)(CO
 
3
)(OH)
 
3
F
9.BE.67Jinshajiangite
BaNaFe
2+
4
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH)
 
2
F
9.BE.67Perraultite
BaNaMn
2+
4
Ti
 
2
 (Si
 
2
O
 
7
)
 
2
O
 
2
(OH)
 
2
F
9.BE.67Surkhobite
NaCaBa
 
2
Mn
 
8
Ti
 
4
(Si
 
2
O
 
7
)
 
4
O
 
5
F
 
5
9.BE.70Karnasurtite-(Ce)
(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si
 
2
O
 
7
)(OH)
 
4
 · 3H
 
2
O
9.BE.70Perrierite-(Ce)
(Ce,Ca,Th)
 
4
(Fe
2+
 
,Mg)Fe
3+
2
(Ti,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Strontiochevkinite
(Sr,La,Ce,Ca)
 
4
Fe
2+
 
(Ti,Zr)
 
2
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Chevkinite-(Ce)
(Ce,La,Ca,Th)
 
4
(Fe
2+
 
,Mg)(Fe
2+
 
,Ti,Fe
3+
 
)
 
2
(Ti,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Polyakovite-(Ce)
(Ce,Ca)
 
4
(Mg,Fe
2+
 
)(Cr
3+
 
,Fe
3+
 
)
 
2
(Ti,Nb)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Rengeite
Sr
 
4
ZrTi
 
4
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Matsubaraite
Sr
 
4
Ti
 
5
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Dingdaohengite-(Ce)
(Ce,La)
 
4
Fe
2+
 
(Ti,Fe
2+
 
,Mg,Fe
2+
 
)
 
2
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Maoniupingite-(Ce)
(Ce,Ca)
 
4
(Fe
3+
 
,Ti,Fe
2+
 
,◻)(Ti,Fe
3+
 
,Fe
2+
 
,Nb)
 
4
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Perrierite-(La)
(La,Ce,Ca)
 
4
(Fe,Mn
2+
 
,Mg)Fe
3+
2
(Ti,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70UKI-2008-(SiO:SrTiZr)
Sr
 
4
ZrTi
 
4
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.70Hezuolinite
(Sr,REE)
 
4
Zr(Ti,Fe
3+
 
)
 
4
(Si
 
2
O
 
7
)
 
2
O
 
8
9.BE.72Fersmanite
Ca
 
4
(Na,Ca)
 
4
(Ti,Nb)
 
4
(Si
 
2
O
 
7
)
 
2
O
 
8
F
 
3
9.BE.75Belkovite
Ba
 
3
(Nb,Ti)
 
6
(Si
 
2
O
 
7
)
 
2
O
 
12
9.BE.77Nasonite
Pb
 
6
Ca
 
4
(Si
 
2
O
 
7
)
 
3
Cl
 
2
9.BE.80Kentrolite
Pb
 
2
Mn
3+
2
(Si
 
2
O
 
7
)O
 
2
9.BE.80Melanotekite
Pb
 
2
Fe
3+
2
(Si
 
2
O
 
7
)O
 
2
9.BE.82Tilleyite
Ca
 
5
(Si
 
2
O
 
7
)(CO
 
3
)
 
2
9.BE.85Killalaite
Ca
 
3
(Si
 
2
O
 
7
) · 0.5H
 
2
O
9.BE.87Stavelotite-(La)
(La,Nd,Ca)
 
3
Mn
2+
3
Cu(Mn
3+
 
,Fe
3+
 
,Mn
4+
 
)
 
26
(Si
 
2
O
 
7
)
 
6
O
 
5
9.BE.90Biraite-(Ce)
Ce
 
2
Fe
2+
 
(Si
 
2
O
 
7
)(CO
 
3
)
9.BE.92Cervandonite-(Ce)
(Ce,Nd,La)(Fe
3+
 
,Fe
2+
 
,Ti,Al)
 
3
O
 
2
(Si
 
2
O
 
7
)(As
3+
 
O
 
3
)(OH)
9.BE.95Batisivite
BaV
3+
8
Ti
 
6
(Si
 
2
O
 
7
)O
 
22
Related Minerals - Hey's Index Grouping:

- +
14.10.1Zircon
ZrSiO
 
4
14.10.2Hafnon
HfSiO
 
4
14.10.3Zektzerite
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
14.10.4Parakeldyshite
Na
 
2
ZrSi
 
2
O
 
7
14.10.5Vlasovite
Na
 
2
ZrSi
 
4
O
 
11
14.10.6Keldyshite
(Na,H)
 
2
ZrSi
 
2
O
 
7
14.10.7Gaidonnayite
Na
 
2
Zr(Si
 
3
O
 
9
) · 2H
 
2
O
14.10.8Terskite
Na
 
4
ZrSi
 
6
O
 
16
 · 2H
 
2
O
14.10.9Elpidite
Na
 
2
ZrSi
 
6
O
 
15
 · 3H
 
2
O
14.10.10Hilairite
Na
 
2
Zr[SiO
 
3
]
 
3
 · 3H
 
2
O
14.10.11Petarasite
Na
 
5
Zr
 
2
(Si
 
6
O
 
18
)(Cl,OH) · 2H
 
2
O
14.10.12Khibinskite
K
 
2
ZrSi
 
2
O
 
7
14.10.13Wadeite
K
 
2
Zr(Si
 
3
O
 
9
)
14.10.14Dalyite
K
 
2
ZrSi
 
6
O
 
15
14.10.15Kostylevite
K
 
2
Zr(Si
 
3
O
 
9
) · H
 
2
O
14.10.16Umbite
K
 
2
(Zr,Ti)Si
 
3
O
 
9
 · H
 
2
O
14.10.17Paraumbite
K
 
3
Zr
 
2
H(Si
 
3
O
 
9
)
 
2
 · nH
 
2
O
14.10.18Georgechaoite
NaKZr[Si
 
3
O
 
9
] · 2H
 
2
O
14.10.19Gittinsite
CaZrSi
 
2
O
 
7
14.10.20Calciocatapleiite
CaZr(Si
 
3
O
 
9
) · 2H
 
2
O
14.10.21Calciohilairite
CaZr[SiO
 
3
]
 
3
 · 3H
 
2
O
14.10.22Armstrongite
CaZr[Si
 
6
O
 
15
] · 3H
 
2
O
14.10.23Lemoynite
(Na,K)
 
2
CaZr
 
2
Si
 
10
O
 
26
 · 5H
 
2
O
14.10.24Catapleiite
Na
 
2
Zr(Si
 
3
O
 
9
) · 2H
 
2
O
14.10.26Lovozerite
Na
 
2
CaZr(H
 
4
Si
 
6
O
 
18
) · H
 
2
O
14.10.27Låvenite
(Na,Ca)
 
2
(Mn
2+
 
,Fe
2+
 
)(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
14.10.28Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
 · 4H
 
2
O
14.10.29Darapiosite
KNa
 
2
(Zn,Li)
 
3
(Mn,Zr)
 
2
[Si
 
12
O
 
30
]
14.10.30Bazirite
BaZr(Si
 
3
O
 
9
)
14.10.31Komkovite
BaZr[Si
 
3
O
 
9
] · 3H
 
2
O
14.10.32Zirsinalite
Na
 
6
(Ca,Mn
2+
 
,Fe
2+
 
)Zr(Si
 
6
O
 
18
)
14.10.33Tranquillityite
(Fe
2+
 
,Ca)
 
8
(Zr,Y)
 
2
Ti
 
3
(SiO
 
4
)
 
3
O
 
4

Other Names for Baghdadite

Other Languages:
German:Baghdadit
Russian:Багдадит
Spanish:Baghdadita

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 Baghdadite

Reference List:

- +
Mineralogical Magazine (1986): 50: 119-123.

Internet Links for Baghdadite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Baghdadite details from Handbook of Mineralogy (PDF)
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    • Localities for Baghdadite

    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.
    Iraq
     
    • Qala-Diz (Qala-Dizeh; Qala-Diza)
      • Hero
    		Al-Hermezi, H. M., McKie, D., & Hall, A. J. (1986). Baghdadite, a new calcium zirconium silicate mineral from Iraq. Mineralogical Magazine, 50, 119-123.
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi City
            • Bitchu-cho (Bicchu-cho)
    		Lapis 2002(11), 12.
      • Tohoku Region
        • Iwate Prefecture
          • Esashi City
    		Matsubara, S., Miyawaki, R. (1999). Baghdadite from the Akagana Mine, Iwate Prefecture, Japan. Bull. Nat. Sci. Mus., Tokyo, Ser. C., 25 (3-4): 65-72.
    Norway
     
    • Telemark
      • Skien
    		Jamtveit B., Dahlgren S. and Austrheim H. (1997): High-grade contact metamorphism of calcareous rocks from the Oslo Rift, Southern Norway. American Mineralogist. 82 : 1241 - 1254
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
          • Dovyren Highlands
    		Galuskin, Evgeny V. et al. (2007) Dovyrenite Ca6Zr[Si2O7]2(OH)4: Vol. 38(1) , 15-27.
    UK
     
    Tindle, A.G. (2008) Minerals of Britian and Ireland
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