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Guangzhi Tu
Colourless to white
Specific Gravity:
3.452 (Calculated)
Crystal System:
Named in honor of Guangzhi Tu (涂光炽) (14 February 1920, Beijing, China - 31 July 2007, Beijing, China), "the founding director of the institute of Geochemistry, Chinese Academy of Sciences (in Guiyang) and first President of the Chinese Society of Mineralogy, Petrology and Geochemistry, in honour of his great contribution to geochemistry research and his pioneering work in studying Chinese meteorites."
Dimorph of:
High-pressure polymorph of merrillite.

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Classification of TuiteHide

Approval Year:

A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations

3 : (AB)3(XO4)2

Physical Properties of TuiteHide

Colourless to white
Hardness Data:
Could not be measured
None Observed
3.452 g/cm3 (Calculated)

Optical Data of TuiteHide

Uniaxial (+)
RI values:
nω = 1.701 nε = 1.706
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of TuiteHide


Crystallography of TuiteHide

Crystal System:
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
Cell Parameters:
a = 5.258 Å, c = 18.727 Å
a:c = 1 : 3.562
Unit Cell V:
448.37 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.891 (80)
2.628 (100)
2.214 (20)
1.945 (45)
1.730 (25)
1.567 (22)
1.518 (20)

Type Occurrence of TuiteHide

General Appearance of Type Material:
microscopic tabular grains (< 0.02 mm)
Place of Conservation of Type Material:
Geological Museum of the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, China
Geological Setting of Type Material:
high pressure phase in a meteorite
Associated Minerals at Type Locality:

Synonyms of TuiteHide

Other Language Names for TuiteHide

Simplified Chinese:涂氏磷钙石
Traditional Chinese:塗氏磷鈣石

Relationship of Tuite to other SpeciesHide

Other Members of this group:
FerromerrilliteCa9NaFe2+(PO4)7Trig. 3m : R3c
Hedegaardite(Ca,Na)9(Ca,Na)Mg(PO4)6(PO3OH)Trig. 3m : R3c
MerrilliteCa9NaMg(PO4)7Trig. 3m : R3m
StrontiowhitlockiteSr9Mg(PO4)6(HPO4)Trig. 3m : R3c
WhitlockiteCa9Mg(PO4)6(HPO4)Trig. 3m : R3c

Related Minerals - Nickel-Strunz GroupingHide

8.AC.WopmayiteCa6Na3□Mn(PO4)3(PO3OH)4 Trig. 3m : R3c
8.AC.05HowardevansiteNaCuFe2(VO4)3Tric. 1 : P1
8.AC.10Arseniopleite(Ca,Na)NaMn2+(Mn2+,Mg,Fe2+)2(AsO4)3Mon. 2/m : P2/b
8.AC.10Caryinite(Na,Pb)(Ca,Na)CaMn2+2(AsO4)3Mon. 2/m
8.AC.10HagendorfiteNaCaMn2+Fe2+2(PO4)3Mon. 2/m : B2/b
8.AC.10JohilleriteNa(Mg,Zn)3Cu(AsO4)3Mon. 2/m : B2/b
8.AC.10NickenichiteNa0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3Mon. 2/m : B2/b
8.AC.10VaruliteNaCaMn2+Mn2+2(PO4)3Mon. 2/m : B2/b
8.AC.10BradaczekiteNaCu4(AsO4)3Mon. 2/m : B2/b
8.AC.10YazganiteNaFe3+2(Mg,Mn2+)(AsO4)3 · H2OMon. 2/m : B2/b
8.AC.10GroatiteNaCaMn2(PO4)(HPO4)2Mon. 2/m : B2/b
8.AC.15BobfergusoniteNa2Mn5FeAl(PO4)6Mon. 2/m : P2/b
8.AC.15Ferrowyllieite(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3Mon. 2/m : P21/b
8.AC.15QingheiiteNaMn3+Mg(Al,Fe3+)(PO4)3Mon. 2/m : P21/b
8.AC.15Rosemaryite(Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3Mon. 2/m : P21/b
8.AC.15Wyllieite(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3Mon. 2/m
8.AC.15Qingheiite-(Fe2+)Na2Fe2+MgAl(PO4)3Mon. 2/m : P21/m
8.AC.18ManitobaiteNa16Mn2+ 25Al8(PO4)30Mon. m : Pb
8.AC.20MarićiteNaFe2+(PO4)Orth. mmm (2/m 2/m 2/m) : Pmna
8.AC.25Berzeliite(NaCa2)Mg2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
8.AC.25ManganberzeliiteNaCa2Mn2+2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
8.AC.25Palenzonaite(Ca,Na)3CaMn2+2(VO4)3Iso. m3m (4/m 3 2/m) : Ia3d
8.AC.30BrianiteNa2CaMg(PO4)2Mon. 2/m : P21/b
8.AC.35Vitusite-(Ce)Na3(Ce,La,Nd)(PO4)2Orth. mm2 : Pca21
8.AC.40Olgite(Sr,Ba)(Na,Sr,REE)2Na(PO4)2Trig. 3m (3 2/m) : P3m1
8.AC.40Bario-olgite(Ba,Sr)(Na,Sr,REE)2Na(PO4)2 · Trig. 3 : P3
8.AC.45StrontiowhitlockiteSr9Mg(PO4)6(HPO4)Trig. 3m : R3c
8.AC.45WhitlockiteCa9Mg(PO4)6(HPO4)Trig. 3m : R3c
8.AC.45MerrilliteCa9NaMg(PO4)7Trig. 3m : R3m
8.AC.45FerromerrilliteCa9NaFe2+(PO4)7Trig. 3m : R3c
8.AC.50Chladniite{Ca}{Na8}{Ca4Na4}{(Mg,Fe2+)43}(PO4)36Trig. 3 : R3
8.AC.50Fillowite{Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36Trig. 3 : R3
8.AC.50Galileiite{Fe2+}{Na8}{Fe2+4Na4}{Fe2+43}(PO4)36Trig. 3 : R3
8.AC.50Stornesite-(Y){(Y, Ca)}{Na62}{(Ca,Na)8}{(Mg,Fe2+)43}(PO4)36Trig. 3 : R3
8.AC.50XenophylliteNa4Fe2+7(PO4)6Tric. 1 : P1
8.AC.60KosnariteKZr2(PO4)3Trig. 3m (3 2/m) : R3c
8.AC.65Panethite(Na,Ca)2(Mg,Fe2+)2(PO4)2Mon. 2/m : P21/b
8.AC.75RonneburgiteK2MnV4O12Mon. 2/m
8.AC.80Tillmannsite(Ag3Hg)(VO4,AsO4)Tet. 4 : I4
8.AC.85FilatoviteK(Al,Zn)2(As,Si)2O8Mon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide 3m : R3c 3m : R3c,◻)19Mg2(PO4)14Trig. 3m : R3m 3m : R3c 3m : R3c

Other InformationHide

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 TuiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Xie, X., Minitti, M.E., Chen, M., Mao, H.-K., Wang, D., Shu, J., Fei, Y. (2003) Tuite, γ-Ca3(PO4)2 - A new mineral from the Suizhou L6 chondrite. European Journal of Mineralogy: 15: 1001-1005.
Jambor, J.L., Roberts, A.C. (2004) New mineral names. American Mineralogist: 89: 1826-1834.
Mandarino, J.A. (2004) New minerals. The Canadian Mineralogist: 42: 1241-1260.
Thompson, R.M., Xie, X., Zhai, S., Downs, R.T., Yang, H. (2013) A comparison of the Ca3(PO4)2 and CaSiO3 systems, with a new structure refinement of tuite synthesized at 15 GPa and 1300 ºC. American Mineralogist: 98: 1585-1592.
Zhai, S., Yamazaki, D., Xue, W., Ye, L., Xu, C., Shan, S., Ito, E., Yoneda, A., Yoshino, T., Guo, X., Shimojuku, A., Tsujino, N., Funakoshi, K.I. (2013) P-V-T relations of γ-Ca3(PO4)2 tuite determined by in situ X-ray diffraction in a large-volume high-pressure apparatus. American Mineralogist: 98: 1811-1816.

Internet Links for TuiteHide

Localities for TuiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Eastern Antarctica
    • American Highland
      • Grove Mts
YT Lin, Lu Feng, Sen Hu (2011) High Pressure Mineral Assemblages in the Lherzolitic Shergottite Grove Mountains (GRV) 020090. Japan Geooscience Union Meeting Makuhari, Chiba Japan.
  • Queensland
    • Barcoo Shire
      • Windorah
        • Tenham Station
Excalibur Minerals CATALOG 20601 - Volume XXXIII, No. 1
China (TL)
  • Hubei
    • Suizhou
      • Zengdu District (Cengdou District)
        • Xihe
Xie Xiande, Minetti, M. E., Chen Ming, Mao Ho-kwang, Wang Deqiang, Shu Jinfu, and Eei Yingwei (2003): European Journal of Mineralogy 15, 1001-1005.; Chen, M., Shu, J., & Mao, H. K. (2008). Xieite, a new mineral of high-pressure FeCr2O4 polymorph. Chinese Science Bulletin, 53(21), 3341-3345.; Chen, M., & Xie, X. (2015). Shock-produced akimotoite in the Suizhou L6 chondrite. Science China Earth Sciences, 58(6), 876-880.
  • Souss-Massa Region
    • Tata Province
Baziotis, I. P., Liu, Y., DeCarli, P. S., Melosh, H. J., McSween, H. Y., Bodnar, R. J., & Taylor, L. A. (2013). The Tissint Martian meteorite as evidence for the largest impact excavation. Nature Communications, 4, 1404.
North Africa
  • Sahara Desert
Ozawa, S., Ohtani, E., Suzuki, A., Miyahara, M., Terada, K., & Kimura, M. (2007, December). Shock metamorphism of L6 chondrites Sahara 98222 and Yamato 74445: the PT conditions and the shock age. In AGU Fall Meeting Abstracts.
Northwest Africa Meteorites
Suporn Boonsuea & John Spraya (2012) Shock-Induced Phase Transformations in Melt Pockets within Martian Meteorite NWA 4468. Spectroscopy Letters: An International Journal for Rapid Communication 45:127-134.
  • Sakha Republic (Yakutia)
    • Oimyakon ulus
Litasov, K. D., & Podgornykh, N. M. (2017). Raman spectroscopy of various phosphate minerals and occurrence of tuite in the Elga IIE iron meteorite. Journal of Raman Spectroscopy, 48(11), 1518-1527.
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