Tikhonenkovite Mineral Data

Tikhonenkovite Mineral Data +

General Tikhonenkovite Information

Chemical Formula:

SrAl(OH)F4·(H2O)

Composition:

Molecular Weight = 225.62 gm

Strontium 38.84 % Sr 45.93 % SrO

Aluminum 11.96 % Al 22.60 % Al₂O₃

Hydrogen 1.34 % H 11.98 % H₂O

Oxygen 14.18 % O

Fluorine 33.68 % F 33.68 % F

- % F -14.18 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

SrAl(OH)F₄·(H₂O)

Environment:

In iron ores.

IMA Status:

Approved IMA 1964

Locality:

Karasug, Tannu-Ola range, Tuva, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Igor Tikhonenkov (1927-1961), Russian student of alkaline rocks and minerals.

Synonym:

ICSD 23025

PDF 17-501

Tikhonenkovite Image

Images:

Tikhonenkovite

Comments: Colorless tikhonenkovite grain.
Location: Karasug Fe-REE-barite-fluorite Deposit, Tannu-Ola Range, Tuva Republic, Eastern-Siberian Region, Russia. Scale: Grain length 1.8 mm.
© Thomas Witzke / Abraxas-Verlag

Tikhonenkovite Crystallography

Axial Ratios:

a:b:c =0.822:1:0.4726

Cell Dimensions:

a = 8.73, b = 10.62, c = 5.02, Z = 4; beta = 102.43° V = 454.51 Den(Calc)= 3.30

Crystal System:

MonoclinicSpace Group: Unk

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

By Intensity(I/I_o): 4.89(1), 3.64(0.9), 3.27(0.8),

Crystal Structure:

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Pudovkina Z V , Chernitsova N M , Pyatenko Yu A , Journal of Structural Chemistry , 14 (1973) p.445-448, Crystal structure refinement of tikhonenkovite Sr2[Al2F8(OH)2]*2H2O

Physical Properties of Tikhonenkovite

Cleavage:

[001] Perfect

Color:

Colorless, Light pink.

Density:

3.26

Diaphaniety:

Transparent

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Tikhonenkovite

Gladstone-Dale:

CI meas= 0.178 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.188 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.138,KPDmeas= 0.1397,KC= 0.1699

Optical Data:

Biaxial (-), a=1.452, b=1.456, g=1.458, bire=0.0060, 2V(Calc)=70, 2V(Meas)=70.

Calculated Properties of Tikhonenkovite

Electron Density:

r_electron=3.06 gm/cc
note: r_{Tikhonenkovite}=3.26 gm/cc.

Fermion Index

Fermion Index = 0.02725
Boson Index = 0.97275

Photoelectric:

PE_{Tikhonenkovite}= 44.23 barns/electron
U=PE_{Tikhonenkovite} x r_electron= 135.48 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tikhonenkovite is Not Radioactive

Tikhonenkovite Classification

Dana Class:

11.6.16.1 (11)Halide Complexes; Alumino-fluorides

(11.6)with miscellaneous formulae

(11.6.16)Dana Group

11.6.16.1 Tikhonenkovite SrAl(OH)F4·(H2O) Unk Mono

Strunz Class:

III/C.01-30 III - Halogenides

III/C - Double halogenides with water, Fluorides

III/C.01 - Gearksutite - Chukhrovite - (Ce) series

III/C.01-10 Gearksutite CaAl(OH,F)5·(H2O) Mono

III/C.01-20 Acuminite SrAlF4(OH)·(H2O) C 2/c 2/m

III/C.01-30 Tikhonenkovite SrAl(OH)F4·(H2O) Unk Mono

III/C.01-35 Artroeite PbAlF3(OH)2 P1 1

III/C.01-40 Creedite Ca3Al2(SO4)(F,OH)10·2(H2O) C 2/c 2/m

III/C.01-50 Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13·10(H2O) F d3 2/m 3

III/C.01-60 Chukhrovite-(Ce) Ca3(Ce,Y)Al2(SO4)F13·10(H2O) F d3 2/m 3

Other Tikhonenkovite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Tikhonenkovite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Tikhonenkovite

SrAl(OH)F4·(H2O)
Dana No: 11.6.16.1 Strunz No: III/C.01-30
Locality:

Notes: