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Tuite Mineral Data

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General Tuite Information

Help on Chemical  Formula: Chemical Formula: Ca3(PO4)2
Help on Composition: Composition: Molecular Weight = 306.55 gm
   Sodium       2.10 %  Na    2.83 % Na2O
   Calcium     32.81 %  Ca   45.91 % CaO
   Magnesium    2.14 %  Mg    3.55 % MgO
   Iron         0.36 %  Fe    0.47 % FeO
   Phosphorus  20.41 %  P    46.77 % P2O5
   Oxygen      42.17 %  O
              ______        ______ 
              100.00 %       99.53 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2.51Na0.28Mg0.27Fe2+0.02(PO4)2.02
Help on Environment: Environment: In a shock-melt vein of the meteorite. High pressure polymorph of whitlockite.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Suizhou L6 chondrite meteorite, which fell in 1986 in Dayanpo, 12.5 km southeast of the city of Suizhou, Hubei Province, People�s Republic of China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Guangzhi Tu (1920-), professor and founding director of the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong Province, People�s Repub lic of China.
Help on Synonym: Synonym: IMA2001-070

Tuite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.56162
Help on Cell Dimensions: Cell Dimensions: a = 5.258, c = 18.727, Z = 3; V = 448.37 Den(Calc)= 3.41
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.628(1)(110), 2.891(0.8)(105), 1.945(0.47)(205),1.73(0.245)(0.1.10), 2.214(0.2)(202), 2.047(0.16), 2.078(0.12),

Physical Properties of Tuite

Help on Color: Color: White, Yellowish gray.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Tuite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.056 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2063,KC= 0.1954
Ncalc = 1.67
Help on Optical Data: Optical Data: Uniaxial (+), w=1.701, e=1.706, bire=0.0050.

Calculated Properties of Tuite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.38 gm/cc
note: Specific Gravity of Tuite =3.41 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0028633438
Boson Index = 0.9971366562
Help on Photoelectric: Photoelectric: PETuite = 5.21 barns/electron
U=PETuite x rElectron Density= 17.60 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tuite is Not Radioactive

Tuite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.03)(A+ B++)3 (XO4)2
  (38.03.04)Whitlockite group Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m Tuite! Ca3(PO4)2 R 3m 3m Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m
Help on  Strunz Class: Strunz Class: 08.AC.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.45 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m
08.AC.45 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m
08.AC.45 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m
08.AC.45 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m
08.AC.45 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m
08.AC.45 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m
08.AC.45 Tuite! Ca3(PO4)2 R 3m 3m
08.AC.45 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m

Other Tuite Information

Help on References: References: NAME( CanMin, v 42:1259) PHYS. PROP.(CanMin, v 42:1259) OPTIC PROP.(CanMin, v 42:1259)
Help on See Also: See Also: Links to other databases for Tuite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.AC.45





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