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Baghdadite

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Formula:
Ca3Zr(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

Physical Properties of Baghdadite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, pale brown, beige, pale yellowish
Streak:
White
Hardness (Mohs):
6

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

IMA Formula:
Ca3Zr(Si2O7)O2
Elements listed in formula:
Common Impurities:
Al,Fe,Mg,Na

Crystallography of Baghdadite

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

Type Occurrence of Baghdadite

Relationship of Baghdadite to other Species

Other Members of Group:
BurpaliteNa2CaZr(Si2O7)F2
CuspidineCa4(Si2O7)(F,OH)2
Hiortdahlite(Na,Ca)2Ca4Zr(Mn,Ti,Fe)(Si2O7)2(F,O)4
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.02WadsleyiteMg2SiO4
9.BE.05HennomartiniteSrMn23+Si2O7(OH)2 · H2O
9.BE.05LawsoniteCaAl2Si2O7(OH)2 · H2O
9.BE.05NoelbensoniteBaMn23+Si2O7(OH)2 · H2O
9.BE.05ItoigawaiteSrAl2Si2O7(OH)2 · H2O
9.BE.07IlvaiteCaFe3+Fe22+O(Si2O7)(OH)
9.BE.07ManganilvaiteCaFe2+Fe3+Mn2+(Si2O7)O(OH)
9.BE.10SuoluniteCa2Si2O5(OH)2 · H2O
9.BE.12JaffeiteCa6Si2O7(OH)6
9.BE.15FresnoiteBa2TiO(Si2O7)
9.BE.17BurpaliteNa2CaZr(Si2O7)F2
9.BE.17CuspidineCa4(Si2O7)F2
9.BE.17Hiortdahlite(Na,Ca)2Ca4Zr(Mn,Ti,Fe)(Si2O7)2(F,O)4
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,Nb)(Si2O7)(O,OH,F)2
9.BE.17NiocaliteCa7Nb(Si2O7)2O3F
9.BE.17NormanditeNaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF
9.BE.17WöhleriteNaCa2(Zr,Nb)(Si2O7)(O,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-(Ce)(Ca3Ce)[(H2O)2Ca0.50.5]Ti(Si2O7)2(OH)2(H2O)2
9.BE.20Nacareniobsite-(Ce)(Ca3Ce)Na3Nb(Si2O7)2(OF)F2
9.BE.22GötzeniteCa4NaCa2Ti(Si2O7)2(OF)F2
9.BE.22Hainite-(Y)(Ca3Y)Na(NaCa)Ti(Si2O7)2(OF)F2
9.BE.22RosenbuschiteCa6Zr2Na6ZrTi(Si2O7)4(OF)2F4
9.BE.22KochiteCa2MnZrNa3Ti(Si2O7)2(OF)F2
9.BE.23DovyreniteCa6Zr(Si2O7)2(OH)4
9.BE.25Barytolamprophyllite(BaK)Ti2Na3Ti(Si2O7)2O2(OH)2
9.BE.25EricssoniteBaMn22+Fe3+(Si2O7)O(OH)
9.BE.25Lamprophyllite(SrNa)Ti2Na3Ti(Si2O7)2O2(OH)2
9.BE.25Ericssonite-2OBaMn22+Fe3+(Si2O7)O(OH)
9.BE.25SeidozeriteNa2Zr2Na2MnTi(Si2O7)2O2F2
9.BE.25Nabalamprophyllite(BaNa)Ti2Na3Ti(Si2O7)2O2(OH)2
9.BE.25GrenmariteNa2Zr2Na2MnZr(Si2O7)2O2F2
9.BE.25SchülleriteBa2Ti2Na2Mg2(Si2O7)2O2F2
9.BE.25LileyiteBa2Ti2Na2Fe2+Mg(Si2O7)2O2F2
9.BE.27MurmaniteNa2Ti2Na2Ti2(Si2O7)2O4(H2O)4
9.BE.30Epistolite(Na◻)Nb2Na3Ti(Si2O7)2O2(OH)2(H2O)4
9.BE.32LomonosoviteNa6Na2Ti2Na2Ti2(Si2O7)2(PO4)2O4
9.BE.35VuonnemiteNa6Na2Nb2Na3Ti(Si2O7)2(PO4)2O2(OF)
9.BE.37SoboleviteNa6(Na2Ca)(NaCaMn)Na2Ti2Na2(TiMn)(Si2O7)2(PO4)4O2(OF)F2
9.BE.40InneliteBa4Ti2Na(NaCa)Ti(Si2O7)2[(SO4)(PO4)]O2[O(OH)]
9.BE.40PhosphoinneliteNa3Ba4Ti3Si4O14(PO4)2O2F
9.BE.42YoshimuraiteBa4Mn42+Ti2(Si2O7)2(PO4)2O2(OH)2
9.BE.45QuadruphiteNa6Na2(CaNa)2Na2Ti2Na2Ti2(Si2O7)2(PO4)4O4F2
9.BE.47PolyphiteNa6(Na4Ca2)2Na2Ti2Na2Ti2(Si2O7)2(PO4)6O4F4
9.BE.50BornemaniteNa6(Na◻)Ba2Ti2Nb2(Si2O7)4(PO4)2O4(OH)2F2
9.BE.50ShkatulkaliteNa10MnTi3Nb3(Si2O7)6(OH)2F · 12H2O
9.BE.55BafertisiteBa2Fe42+Ti2(Si2O7)2O2(OH)2F2
9.BE.55HejtmaniteBa2Mn42+Ti2(Si2O7)2O2(OH)2F2
9.BE.55Bykovaite(Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2O2Si4O14(H2O,F,OH)2 · 3.5H2O
9.BE.55Nechelyustovite(Na◻)◻2Ba4Ti4Nb4(Na11◻)Ti4(Si2O7)8O8(OH)8(H2O)12
9.BE.60DelindeiteBa2Ti2(Na2◻)Ti(Si2O7)2(OH)2(H2O)2O2
9.BE.65BusseniteBa4(Na,◻)2(Fe2+,Na)2Ti2(Si2O7)2(CO3)2O2(OH)2(H2O)2F2
9.BE.67JinshajiangiteBaNaFe42+Ti2(Si2O7)2O2(OH)2F
9.BE.67PerraultiteNaBaMn4Ti2(Si2O7)2O2(OH)2F
9.BE.67SurkhobiteKBa3Ca2Na2Mn16Ti8(Si2O7)8O8(OH)4(F,O,OH)8
9.BE.70Karnasurtite-(Ce)CeTiAlSi2O7(OH)4 · 3H2O
9.BE.70Perrierite-(Ce)Ce4MgFe23+Ti24+O8(Si2O7)2
9.BE.70Strontiochevkinite(Sr,Ce,La)4Fe2+(Ti,Zr)4O8(Si2O7)2
9.BE.70Chevkinite-(Ce)Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2
9.BE.70Polyakovite-(Ce)(Ce,Ca)4MgCr2(Ti,Nb)2Si4O22
9.BE.70RengeiteSr4Ti4ZrO8(Si2O7)2
9.BE.70MatsubaraiteSr4Ti5O8(Si2O7)2
9.BE.70Dingdaohengite-(Ce)(Ce3+,La)4Fe2+(Ti,Fe2+,Mg,Fe3+)2Ti2Si4O22
9.BE.70Maoniupingite-(Ce)(Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4Si4O22
9.BE.70Perrierite-(La)(La,Ce,Ca)4(Fe2+,Mn)(Ti,Fe3+,Al)4(Si2O7)2O8
9.BE.70UKI-2008-(SiO:SrTiZr)Sr4ZrTi4(Si2O7)2O8
9.BE.70Hezuolinite(Sr,REE)4Zr(Ti,Fe3+,Fe2+)2Ti2O8(Si2O7)2
9.BE.72FersmaniteCa4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3
9.BE.75BelkoviteBa3Nb6(Si2O7)2O12
9.BE.77NasoniteCa4Pb6(Si2O7)3Cl2
9.BE.80KentrolitePb2Mn23+O2(Si2O7)
9.BE.80MelanotekitePb2Fe23+O2Si2O7
9.BE.82TilleyiteCa5Si2O7(CO3)2
9.BE.85KillalaiteCa3.2[H0.6Si2O7](OH)
9.BE.87Stavelotite-(La)La3Mn32+Cu2+(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30
9.BE.90Biraite-(Ce)Ce2Fe2+Si2O7(CO3)
9.BE.92Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Ti,Fe2+,Al)3O2(Si2O7)1-x+y(AsO3)1+x-y(OH)3x-3y, x=0.5, y=0.3
9.BE.95BatisiviteBaTi6(V,Cr)8Si2O29
14.10.1ZirconZrSiO4
14.10.2HafnonHfSiO4
14.10.3ZektzeriteNaLiZrSi6O15
14.10.4ParakeldyshiteNa2ZrSi2O7
14.10.5VlasoviteNa2ZrSi4O11
14.10.6KeldyshiteNa2ZrSi2O7
14.10.7GaidonnayiteNa2ZrSi3O9 · 2H2O
14.10.8TerskiteNa4ZrSi6O16 · 2H2O
14.10.9ElpiditeNa2ZrSi6O15 · 3H2O
14.10.10HilairiteNa2ZrSi3O9 · 3H2O
14.10.11PetarasiteNa5Zr2Si6O18(Cl,OH) · 2H2O
14.10.12KhibinskiteK2ZrSi2O7
14.10.13WadeiteK2ZrSi3O9
14.10.14DalyiteK2ZrSi6O15
14.10.15KostyleviteK2ZrSi3O9 · H2O
14.10.16UmbiteK2ZrSi3O9 · H2O
14.10.17ParaumbiteK3Zr2H(Si3O9)2 · 3H2O
14.10.18GeorgechaoiteKNaZrSi3O9 · 2H2O
14.10.19GittinsiteCaZrSi2O7
14.10.20CalciocatapleiiteCaZrSi3O9 · H2O
14.10.21CalciohilairiteCaZrSi3O9 · 3H2O
14.10.22ArmstrongiteCaZrSi6O15 · 2H2O
14.10.23LemoyniteNa2CaZr2Si10O26 · 5-6H2O
14.10.24CatapleiiteNa2ZrSi3O9 · 2H2O
14.10.26LovozeriteNa3CaZrSi6O15(OH)3
14.10.27Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti,Nb)(Si2O7)(O,OH,F)2
14.10.28PenkvilksiteNa4Ti2Si8O22 · 4H2O
14.10.29DarapiositeKNa2Mn2(Li2ZnSi12)O30
14.10.30BaziriteBaZrSi3O9
14.10.31KomkoviteBaZrSi3O9 · 3H2O
14.10.32ZirsinaliteNa6CaZrSi6O18
14.10.33TranquillityiteFe82+Ti3Zr2Si3O24

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:
Al-Hermezi, H.M., McKie, D., Hall, A.J. (1986) Baghdadite, a new calcium zirconium silicate mineral from Iraq. Mineralogical Magazine 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

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https://www.mindat.org/min-483.html
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Localities for Baghdadite

This 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.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Mayen
        • Ettringen
          • Bellerberg volcano
            • Caspar quarry
in the collection of Christof Schäfer
Iraq (TL)
 
  • Iraqi Kurdistan
    • Sulaymaniyah province
      • 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
        • Ohshuu City
          • Esashi ward
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
    • Sakha Republic (Saha Republic; Yakutia)
Gałuskina, I.O., Gałuskin, E.V., Lazic, B., Armbruster, T., Dzierżanowski, P., Prusik, K., Wrzalik, R. (2010): Eringaite, Ca3Sc2(SiO4)3, a new mineral of the garnet group. Mineralogical Magazine, 74, 365-373.
    • 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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