Hainite-(Y)

Approved, 'Grandfathered' (first described prior to 1959)

Renamed by the IMA

2016: Name changed from hainite to hainite-(Y) (IMA 16-A).

8/C.12-15

9.BE.22

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

56.2.4.9

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

Adamantine, Vitreous

Transparent

wine-yellow, honey-yellow; milk white, brownish, pale pink

light wine-yellow in thin section

5

Brittle

Perfect
rather perfect, {010}; also faint on {100}

3.157-3.391 g/cm³ (Calculated)

Biaxial (+)

n_α = 1.663(2) n_β = 1.664(2) n_γ = 1.675(2)

Measured: 30° to 45°, Calculated: 33.7°

~0.012

δ = 0.012

Moderate

relatively strong (r > v)

Visible

colorless (X), colorless to pale yellow (Y), wine-yellow (Z)

2V(meas.): large

Ca, F, Na, O, Si, Ti, Y - search for minerals with similar chemistry

TL material

Nb2O5 1.38
Ta2O5 0.22
SiO2 32.07
TiO2 8.06
ZrO2 6.53
Al2O3 0.03
La2O3 0.60
Ce2O3 1.01
Fe2O3 1.25
MnO 2.06
CaO 32.05
Na2O 7.46
F 12.09
-O=F2 5.09

total 99.77

Mn,Ce,La,Fe,Nb,Ta,Al

Triclinic

1 - Pinacoidal

a = 9.594 Å, b = 5.702 Å, c = 7.288 Å
α = 89.89(4)°, β = 101.09(4)°, γ = 101.17(4)°

a:b:c = 1.683 : 1 : 1.278

V 383.55 ų

1

on {100}

parameters of the TL material: a=5.676(2), b=7.259(3), c=9.586(3), α=101.08(4), β=101.14(4), γ=90.27(4)

TL material

crystals, less than 1 mm, needles and plates, [001] elongation; {010}, {100}, and {_110} faces present (TL material)

cavities and groundmass of phonolites (TL material); carbonatites

Rinkite Group > Seidozerite Supergroup

Fluoresces under electron beam.

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Blumrich, J. (1893) Die Phonolithe des Friedländer Bezirkes in Nordböhmen, Zeitschrift für Kristallographie, Mineralogie und Petrographie, Vol. 13, No 6, 465-495.

Rastsvetaeva R.K., Pushcharovsky D.Yu, Atencio D. (1995) Crystal structure of giannetite. Crystallography Reports 40(4), 574-578.

Johan, Z., Cech, F. (1989) New data on hainite, Na₂Ca₄(Ti,Zr,Mn,Fe,Nb,Ta)_1.50_0.50)(Si₂O₇)₂F₄ and its crystallochemical relationship with götzenite, Na2Ca5Ti(Si2O7)2F4. Comptes Rendus de l'Academie des Sciences, Série II, 308, 1237-1242 (in French).

Atencio, D., Coutinho, J.M.V., Ulbrich, M.N.C., Vlach, S.R.F., Rastsvetaeva, R.K., Pushcharovsky, D. Y. (1999) Hainite from Poços de Caldas, Minas Gerais, Brazil. The Canadian Mineralogist, 37, 91-98.

Christiansen, C.C., Johnsen, O., Makovicky, E. (2003) Crystal chemistry of the rosenbuschite group. The Canadian Mineralogist 41, 1203-1224.

Giester, G., Pertlik, F., Ulrych, J. (2005) Die Kristallstruktur des Minerals Hainit. Mitteilung der Österreichischen Mineralologischen Gesellschaft 151, 45. (in German) [Poster abstract]

Sokolova, E. (2006) From structure topology to chemical composition. I. Structural hierarchy and stereochemistry in titanium disilicate minerals. The Canadian Mineralogist, 44, 1273.

Lyalina, L., Zolotarev Jr, A., Selivanova, E., Savchenko, Y., Zozulya, D., Krivovichev, S., Mikhailova, Y. (2015) Structural characterization and composition of Y-rich hainite from Sakharjok nepheline syenite pegmatite (Kola Peninsula, Russia). Mineralogy and Petrology, 1-9.

Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Sokolova, E. & Camara, F. (2017): The seidozerite supergroup of TS-block minerals: nomenclature and classification, with change of the following names: rinkite to rinkite-(Ce), mosandrite to mosandrite-(Ce), hainite to hainite-(Y) and innelite-1T to innelite-1A. Mineralogical Magazine: 81 (in press)

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