Parakuzmenkoite-Fe Mineral Data

Parakuzmenkoite-Fe Mineral Data

General Parakuzmenkoite-Fe Information

Chemical Formula:

(K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O)

Composition:

Molecular Weight = 2,567.15 gm

Potassium 2.44 % K 2.94 % K₂O

Barium 8.02 % Ba 8.96 % BaO

Sodium 0.36 % Na 0.48 % Na₂O

Strontium 0.34 % Sr 0.40 % SrO

Calcium 0.16 % Ca 0.22 % CaO

Titanium 8.21 % Ti 13.69 % TiO₂

Manganese 1.50 % Mn 1.93 % MnO

Niobium 12.30 % Nb 17.60 % Nb₂O₅

Zinc 0.25 % Zn 0.32 % ZnO

Iron 3.92 % Fe 5.60 % Fe₂O₃

Silicon 17.50 % Si 37.45 % SiO₂

Hydrogen 1.19 % H 10.60 % H₂O

Oxygen 43.81 % O

______ ______

100.00 % 100.19 % = TOTAL OXIDE

Empirical Formula:

K_1.6Na_0.4Ba_1.5Sr_0.1Ca_0.1Zn_0.1Fe³⁺_1.6Mn²⁺_0.7Ti_4.4Nb_3.4Fe³⁺_0.2(Si₄O₁₂)₄ O_6.4(OH)_1.6·14.3(H₂O)

Environment:

Alkaline pegmatite. Labuntsovite group; structure.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the Fe-dominant analog of kuzmenkoite-Mn with a doubled c-axis.

Synonym:

IMA2001-007

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Parakuzmenkoite-Fe Crystallography

Axial Ratios:

a:b:c =1.0381:1:1.1229

Cell Dimensions:

a = 14.41, b = 13.88, c = 15.587, Z = 2; beta = 117.53° V = 2,764.56 Den(Calc)= 3.08

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.09(1)(042,024), 3.19(1)(422,400), 6.91(1)(020,002),2.58(0.9)(480,484,4.2.11.422(0.8),

Physical Properties of Parakuzmenkoite-Fe

Cleavage:

[???] Imperfect

Color:

Orange, Reddish orange.

Density:

Diaphaniety:

Translucent

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Parakuzmenkoite-Fe

Gladstone-Dale:

CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.236,KPDmeas= 0.2423,KC= 0.256

Optical Data:

Biaxial (+), a=1.687, b=1.689, g=1.805, bire=0.1180

Calculated Properties of Parakuzmenkoite-Fe

Electron Density:

r_electron=2.91 gm/cc
note: r_{Parakuzmenkoite-Fe}=3.00 gm/cc.

Fermion Index

Fermion Index = 0.03447
Boson Index = 0.96553

Photoelectric:

PE_{Parakuzmenkoite-Fe}= 55.51 barns/electron
U=PE_{Parakuzmenkoite-Fe} x r_electron= 161.49 barns/cc.

Radioactivity:

GRapi = 34.08 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Parakuzmenkoite-Fe - barely detectable

Parakuzmenkoite-Fe Classification

Dana Class:

60.1.3h.3 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.3h)Labuntsovite Group (Organovaite subgroup Monoclinic [C2/m])

60.1.3h.1 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m

60.1.3h.2 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

60.1.3h.3 Parakuzmenkoite-Fe ! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

Strunz Class:

VIII/E.07-170 VIII - Silicates

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.07 - Labuntsovite Group

VIII/E.07-10 Korobitsynite! Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-20 Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-30* Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m

VIII/E.07-30 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m

VIII/E.07-32 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

VIII/E.07-33 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-34 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-40 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m

VIII/E.07-50 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m

VIII/E.07-50* Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8(H2O) Cm m

VIII/E.07-60* Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O) C 2/m 2/m

VIII/E.07-60 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2

VIII/E.07-70 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m

VIII/E.07-80 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-90 Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-100 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m

VIII/E.07-110 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m

VIII/E.07-130 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16·n(H2O) I2/m 2/m

VIII/E.07-140 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-150 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-155 Labuntsovite-Mn Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8·n(H2O),n=10-12 I2/m 2/m

VIII/E.07-170 Parakuzmenkoite-Fe (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-180 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-190 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-200 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O) Cm m

VIII/E.07-205 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-210 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

VIII/E.07-220 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

Other Parakuzmenkoite-Fe Information

References:

NAME( AmMin, v 87, p 1735) PHYS. PROP.(AmMin, v 87, p 1735) OPTIC PROP.(AmMin, v 87, p 1735)

See Also:

Links to other databases for Parakuzmenkoite-Fe :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Parakuzmenkoite-Fe

(K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O)
Dana No: 60.1.3h.3 Strunz No: VIII/E.07-170
Locality:

Notes: