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Baghdadite

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Formula:
Ca3(Zr,Ti)(Si2O7)O2
System:
Monoclinic
Colour:
Colourless, pale brown, ...
Lustre:
Vitreous
Hardness:
6
Name:
Named after Baghdad, the capital of Iraq, within which country lies the type locality.

Classification of Baghdadite

Approved
9.BE.17

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
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
14.10.25

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

Year of Discovery:
1986

Physical Properties of Baghdadite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, pale brown, beige, pale yellowish
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°
Max Birefringence:
δ = 0.018
Image 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:
Ca3(Zr,Ti)(Si2O7)O2
Essential elements:
All elements listed in formula:
Common Impurities:
Al,Fe,Mg,Na

Relationship of Baghdadite to other Species

Other Members of Group:
BurpaliteNa2CaZr(Si2O7)F2
CuspidineCa4(Si2O7)(F,OH)2
Hiortdahlite(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
Janhaugite(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2
Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
MarianoiteNa2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
NormanditeNaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF
WöhleriteNaCa2(Zr,Nb)(Si2O7)(O,OH,F)2
9.BE.02Wadsleyite(Mg,Fe2+)2(SiO4)
9.BE.05HennomartiniteSrMn23+(Si2O7)(OH)2 · H2O
9.BE.05LawsoniteCaAl2(Si2O7)(OH)2 · H2O
9.BE.05NoelbensoniteBaMn23+(Si2O7)(OH)2 · H2O
9.BE.05ItoigawaiteSrAl2(Si2O7)(OH)2 · H2O
9.BE.07IlvaiteCaFe22+Fe3+(Si2O7)O(OH)
9.BE.07ManganilvaiteCa(Mn2+,Fe2+)2Fe3+(Si2O7)O(OH)
9.BE.10SuoluniteCa2(H2Si2O7) · H2O
9.BE.12JaffeiteCa6(Si2O7)(OH)6
9.BE.15FresnoiteBa2Ti(Si2O7)O
9.BE.17BurpaliteNa2CaZr(Si2O7)F2
9.BE.17CuspidineCa4(Si2O7)(F,OH)2
9.BE.17Hiortdahlite(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
9.BE.17Janhaugite(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2
9.BE.17Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
9.BE.17Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
9.BE.17NormanditeNaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF
9.BE.17WöhleriteNaCa2(Zr,Nb)(Si2O7)(O,OH,F)2
9.BE.17Hiortdahlite INa4Ca8Zr2(Nb,Mn,Ti,Fe,Mg,Al)2(Si2O7)4O3F5
9.BE.17MarianoiteNa2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
9.BE.20Mosandrite(◻,Ca,Na)3(Ca,REE)4Ti(Si2O7)2[H2O,OH,F]4 · H2O
9.BE.20Nacareniobsite-(Ce)Na3Ca3(Ce,La,Nd)Nb(Si2O7)2OF3
9.BE.22GötzeniteNaCa4(Ca,Na)2(Si2O7)2OF3
9.BE.22HainiteNa4Ca8(Ti,Zr,Mn)3(Si2O7)4F4
9.BE.22Rosenbuschite(Ca,Na)3(Zr,Ti)(Si2O7)OF
9.BE.22Kochite(Na,Ca)3Ca2(Mn,Ca)ZrTi(Si2O7)2(F,O)4
9.BE.23DovyreniteCa6Zr(Si2O7)2(OH)4
9.BE.25Barytolamprophyllite(Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F)
9.BE.25EricssoniteBaMn22+Fe3+(Si2O7)O(OH)
9.BE.25Lamprophyllite(Sr,K,Ba)2(Na,Ti,Mn2+,Fe3+)4Ti2(Si2O7)2O(O,OH,F)
9.BE.25Ericssonite-2OBaMn22+Fe3+(Si2O7)O(OH)
9.BE.25SeidozeriteNa8Mn22+Zr3Ti3(Si2O7)4O4F4
9.BE.25NabalamprophylliteNa3(Ba,Na)2Ti3(Si2O7)2O2(OH,F)2
9.BE.25Grenmarite(Na,Ca)4(Mn,Na)(Zr,Mn)2(Zr,Ti)(Si2O7)2(O,F)4
9.BE.25SchülleriteBa2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4
9.BE.25LileyiteBa2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2
9.BE.27MurmaniteNa2Ti2(Si2O7)O2 · 2H2O
9.BE.30EpistoliteNa2(Nb,Ti)2(Si2O7)O2 · nH2O
9.BE.32LomonosoviteNa5Ti2(Si2O7)(PO4)O2
9.BE.35VuonnemiteNa11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH)
9.BE.37SoboleviteNa13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3
9.BE.40InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4
9.BE.40PhosphoinneliteNa3Ba4Ti3(Si2O7)2(PO4,SO4)2O2F
9.BE.42YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)
9.BE.45QuadruphiteNa14Ca2Ti4(Si2O7)2(PO4)2O2F
9.BE.47PolyphiteNa5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2
9.BE.50BornemaniteNa6BaTi2Nb(Si2O7)2(PO4)O2(OH)F
9.BE.50ShkatulkaliteNa10Mn2+Ti3Nb3(Si2O7)6(OH)2F · 12H2O
9.BE.55BafertisiteBa(Fe2+,Mn2+)2Ti(Si2O7)O(F,OH)2
9.BE.55HejtmaniteBa(Mn2+,Fe2+)2Ti(Si2O7)O(OH,F)
9.BE.55Bykovaite(Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2O
9.BE.55Nechelyustovite(Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2O
9.BE.60Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
9.BE.65BusseniteNa2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3F
9.BE.67JinshajiangiteBaNaFe42+Ti2(Si2O7)2O2(OH)2F
9.BE.67PerraultiteBaNaMn42+Ti2 (Si2O7)2O2(OH)2F
9.BE.67SurkhobiteNaCaBa2Mn8Ti4(Si2O7)4O5F5
9.BE.70Karnasurtite-(Ce)(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O
9.BE.70Perrierite-(Ce)Ce4MgFe23+Ti2(Si2O7)2O8
9.BE.70Strontiochevkinite(Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8
9.BE.70Chevkinite-(Ce)(Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8
9.BE.70Polyakovite-(Ce)(Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8
9.BE.70RengeiteSr4ZrTi4(Si2O7)2O8
9.BE.70MatsubaraiteSr4Ti5(Si2O7)2O8
9.BE.70Dingdaohengite-(Ce)(Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe2+)2Ti2(Si2O7)2O8
9.BE.70Maoniupingite-(Ce)(Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8
9.BE.70Perrierite-(La)(La,Ce,Ca)4(Fe,Mn2+,Mg)Fe23+(Ti,Fe3+)2(Si2O7)2O8
9.BE.70UKI-2008-(SiO:SrTiZr)Sr4ZrTi4(Si2O7)2O8
9.BE.70Hezuolinite(Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8
9.BE.72FersmaniteCa4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3
9.BE.75BelkoviteBa3(Nb,Ti)6(Si2O7)2O12
9.BE.77NasonitePb6Ca4(Si2O7)3Cl2
9.BE.80KentrolitePb2Mn23+(Si2O7)O2
9.BE.80MelanotekitePb2Fe23+(Si2O7)O2
9.BE.82TilleyiteCa5(Si2O7)(CO3)2
9.BE.85KillalaiteCa6.4(H0.6Si2O7)2(OH)2
9.BE.87Stavelotite-(La)(La,Nd,Ca)3Mn32+Cu(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30
9.BE.90Biraite-(Ce)Ce2Fe2+(Si2O7)(CO3)
9.BE.92Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH)
9.BE.95BatisiviteBaV83+Ti6(Si2O7)O22
14.10.1ZirconZrSiO4
14.10.2HafnonHfSiO4
14.10.3ZektzeriteLiNa(Zr,Ti,Hf)Si6O15
14.10.4ParakeldyshiteNa2ZrSi2O7
14.10.5VlasoviteNa2ZrSi4O11
14.10.6Keldyshite(Na,H)2ZrSi2O7
14.10.7GaidonnayiteNa2Zr(Si3O9) · 2H2O
14.10.8TerskiteNa4ZrSi6O16 · 2H2O
14.10.9ElpiditeNa2ZrSi6O15 · 3H2O
14.10.10HilairiteNa2Zr[SiO3]3 · 3H2O
14.10.11PetarasiteNa5Zr2(Si6O18)(Cl,OH) · 2H2O
14.10.12KhibinskiteK2ZrSi2O7
14.10.13WadeiteK2Zr(Si3O9)
14.10.14DalyiteK2ZrSi6O15
14.10.15KostyleviteK2Zr(Si3O9) · H2O
14.10.16UmbiteK2(Zr,Ti)Si3O9 · H2O
14.10.17ParaumbiteK3Zr2H(Si3O9)2 · nH2O
14.10.18GeorgechaoiteNaKZr[Si3O9] · 2H2O
14.10.19GittinsiteCaZrSi2O7
14.10.20CalciocatapleiiteCaZr(Si3O9) · 2H2O
14.10.21CalciohilairiteCaZr[SiO3]3 · 3H2O
14.10.22ArmstrongiteCaZr[Si6O15] · 3H2O
14.10.23Lemoynite(Na,K)2CaZr2Si10O26 · 5H2O
14.10.24CatapleiiteNa2Zr(Si3O9) · 2H2O
14.10.26LovozeriteNa2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2O
14.10.27Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
14.10.28PenkvilksiteNa4Ti2Si8O22 · 4H2O
14.10.29DarapiositeKNa2(Zn,Li)3(Mn,Zr)2[Si12O30]
14.10.30BaziriteBaZr(Si3O9)
14.10.31KomkoviteBaZr[Si3O9] · 3H2O
14.10.32ZirsinaliteNa6(Ca,Mn2+,Fe2+)Zr(Si6O18)
14.10.33Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O4

Other Names for Baghdadite

Name in Other Languages:

Other Information

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 Baghdadite

Reference List:
Mineralogical Magazine (1986): 50: 119-123.

Biagioni, C., Bonaccorsi, E., Perchiazzi, N., Merlino, S. (2010): Single crystal refinement of the structure of baghdadite from Fuka (Okayama Prefecture, Japan). Periodico di Mineralogia, 79, 1-9.

Internet Links for Baghdadite

Localities for Baghdadite

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.
Iraq (TL)
 
  • 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
          • Bicchu-cho (Bitchu-cho)
            • Fuka
Lapis 2002(11), 12.; Biagioni, C., Bonaccorsi, E., Perchiazzi, N., Merlino, S. (2010): Single crystal refinement of the structure of baghdadite from Fuka (Okayama Prefecture, Japan). Periodico di Mineralogia, 79, 1-9.
    • 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 Republic (Buryatia)
        • 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
Mineral and/or Locality  
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