Baghdadite Mineral Data

Baghdadite Mineral Data +

[Newest Minerals] [Rare Minerals] [Past Sale Items] [About Us] [A-Rocks Auctions]
T G Fine Minerals sells Australian Minerals from all the classic and current localities
We are one the most comprehensive sellers of these (Aussie) minerals in the world
Broken Hill specimens are our specialty along with fine worldwide minerals, Australian opals, fossils & gems

General Baghdadite Information

Chemical Formula:

Ca3(Zr,Ti)Si2O9

Composition:

Molecular Weight = 400.79 gm

Calcium 30.00 % Ca 41.98 % CaO

Zirconium 17.07 % Zr 23.06 % ZrO₂

Titanium 2.99 % Ti 4.98 % TiO₂

Silicon 14.02 % Si 29.98 % SiO₂

Oxygen 35.93 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃Zr_0.75Ti_0.25Si₂O₉

Environment:

In a melilite skarn in contact with banded diorite, in roof pendant xenoliths of calc-silicate marbles and hornfels.

IMA Status:

Approved IMA 1982

Locality:

In Dupezeh Mountain, near Hero Town, Qala-Diza region, northeastern Iraq. Link to MinDat.org Location Data.

Name Origin:

For Baghdad, the capital of Iraq.

Search for Baghdadite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Baghdadite Crystallography

Axial Ratios:

a:b:c =1.0255:1:0.7244

Cell Dimensions:

a = 10.42, b = 10.16, c = 7.36, Z = 4; beta = 91.1° V = 779.04 Den(Calc)= 3.42

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.84(1), 2.98(0.85), 3.23(0.8),

Physical Properties of Baghdadite

Cleavage:

None

Color:

Colorless.

Density:

3.48

Diaphaniety:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Baghdadite

Gladstone-Dale:

CI meas= 0.133 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.118 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.193,KPDmeas= 0.1897,KC= 0.2187

Optical Data:

Biaxial (+), a=1.652, b=1.658, g=1.67, bire=0.0180, 2V(Calc)=72, 2V(Meas)=72.

Calculated Properties of Baghdadite

Electron Density:

r_electron=3.34 gm/cc
note: r_Baghdadite=3.42 gm/cc.

Fermion Index

Fermion Index = 0.03013
Boson Index = 0.96987

Photoelectric:

PE_Baghdadite= 27.28 barns/electron
U=PE_Baghdadite x r_electron= 91.02 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Baghdadite is Not Radioactive

Baghdadite Classification

Dana Class:

56.2.4.1 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.2)with cations in [4] and/or >[4] coordination

(56.2.4)Cuspidine - Wohlerite group

56.2.4.1 Baghdadite Ca3(Zr,Ti)Si2O9 P 2₁/a 2/m

56.2.4.2 Burpalite Na2CaZrSi2O7F2 P 2₁/a 2/m

56.2.4.3 Cuspidine Ca4Si2O7(F,OH)2 P 2₁/c 2/m

56.2.4.4 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 2₁/a 2/m

56.2.4.5 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 2₁/m 2/m

56.2.4.6 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m

56.2.4.7 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1

56.2.4.8 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1

56.2.4.9 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1

56.2.4.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 2₁/n 2/m

56.2.4.11 Jennite Ca9Si6O18(OH)6·8H2O P1 1

56.2.4.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2·3.5(H2O) Unk Ortho

56.2.4.13 Na-komarovite? Na6CaNb6[Si4O12F2·4(H2O) C mmm 2/m 2/m 2/m

56.2.4.14 Suolunite Ca2Si2O5(OH)2·(H2O) F dd2 mm2

56.2.4.15 Mongolite Ca4Nb6Si5O24(OH)10·5(H2O) Unk Tetra

56.2.4.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1

56.2.4.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1

Strunz Class:

VIII/C.11-30 VIII - Silicates

VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F]

VIII/C.11 - Wöhlerite - Lavenite series

VIII/C.11-05 Cuspidine Ca4Si2O7(F,OH)2 P 2₁/c 2/m

VIII/C.11-10 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 2₁/m 2/m

VIII/C.11-12 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 2₁/n 2/m

VIII/C.11-15 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 2₁/a 2/m

VIII/C.11-20 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 2₁/a 2/m

VIII/C.11-25 Burpalite Na2CaZrSi2O7F2 P 2₁/a 2/m

VIII/C.11-30 Baghdadite Ca3(Zr,Ti)Si2O9 P 2₁/a 2/m

VIII/C.11-40 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m

VIII/C.11-50 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1

Other Baghdadite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Baghdadite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Baghdadite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Baghdadite Mineral Data :

Ask about Baghdadite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Baghdadite Specimen Label here :

Baghdadite

Ca3(Zr,Ti)Si2O9
Dana No: 56.2.4.1 Strunz No: VIII/C.11-30
Locality:

Notes: