Organovaite-Zn Mineral Data

General Organovaite-Zn Information

Chemical Formula:

K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O)

Composition:

Molecular Weight = 2,439.14 gm

Potassium 3.05 % K 3.67 % K₂O

Barium 2.25 % Ba 2.51 % BaO

Sodium 0.47 % Na 0.64 % Na₂O

Calcium 0.82 % Ca 1.15 % CaO

Titanium 6.28 % Ti 10.48 % TiO₂

Manganese 0.45 % Mn 0.58 % MnO

Niobium 18.28 % Nb 26.15 % Nb₂O₅

Aluminum 0.22 % Al 0.42 % Al₂O₃

Zinc 4.29 % Zn 5.34 % ZnO

Iron 0.23 % Fe 0.29 % FeO

Silicon 18.19 % Si 38.92 % SiO₂

Hydrogen 1.12 % H 10.01 % H₂O

Oxygen 44.34 % O

______ ______

100.00 % 100.16 % = TOTAL OXIDE

Empirical Formula:

K_1.9Na_0.5Ca_0.5Ba_0.4Zn_1.6Mn²⁺_0.2Fe²⁺_0.1Nb_4.8Ti_3.2Si_15.8Al_0.2O_52.5(OH)_3.1·12(H₂O)

Environment:

Alkaline pegmatites. Sometimes forms pseudomorphs after vuonnemite. Labuntsovite group; structure.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

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

Name Origin:

Named for Natalia Ivanovna Organova (1929-), Russian crystallographer and the Zn end-member.

Synonym:

IMA2001-006

Organovaite-Zn Image

Images:

Organovaite-Zn

Comments: Crude pinkish-brown organovaite-Zn crystals in matrix.
Location: Mt. Karnasurt, Lovozero, Kola Peninsula, Russia. Scale: Specimen Size 1x2.5 cm.
© Diederik Visser

Organovaite-Zn Crystallography

Axial Ratios:

a:b:c =1.0436:1:1.1247

Cell Dimensions:

a = 14.535, b = 13.927, c = 15.665, Z = 1; beta = 117.6° V = 2,810.20 Den(Calc)= 1.44

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): 6.96(1)(020,002), 3.222(0.84)(422,400,4043.114(0.66)(042,024), 2.514(0.3)(442,402), 4.924(0.3)(022), 6.43(0.24)(200,202), 1.43(0.22),

Physical Properties of Organovaite-Zn

Cleavage:

None

Color:

Pink, Pinkish brown, White.

Density:

2.88

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

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

Habit:

Pseudomorphous - Occurs in the form of another mineral.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Organovaite-Zn

Gladstone-Dale:

CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.986 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.4991,KPDmeas= 0.2495,KC= 0.2513
Ncalc = 1.36 - 1.72

Optical Data:

Biaxial (+), a=1.683, b=1.688, g=1.785, bire=0.1020

Calculated Properties of Organovaite-Zn

Electron Density:

Bulk Density (Electron Density)=2.81 gm/cc
note: Specific Gravity of Organovaite-Zn =2.88 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Organovaite-Zn}= 40.28 barns/electron
U=PE_{Organovaite-Zn} x r_electron= 113.04 barns/cc.

Radioactivity:

GRapi = 42.83 (Gamma Ray American Petroleum Institute Units)
Concentration of Organovaite-Zn per GRapi unit = 2.33 (%)

Estimated Radioactivity from Organovaite-Zn - barely detectable

Organovaite-Zn Classification

Dana Class:

60.01.03h.02 (60)Cyclosilicate Four-Membered Rings

(60.01)as Titanosilicates

(60.01.03h)Labuntsovite Group (Organovaite subgroup Monoclinic [C2/m])

60.01.03h.01 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) Cm m

60.01.03h.02 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m

60.01.03h.03 Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m

Strunz Class:

09.CE.30g 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),

09.CE.30g Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m

09.CE.30g Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m

09.CE.30g Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) Cm m

Other Organovaite-Zn Information

References:

NAME( AmMin, v 88, p 932) PHYS. PROP.(AmMin, v 88, p 932) OPTIC PROP.(AmMin, v 88, p 932)

See Also:

Links to other databases for Organovaite-Zn :
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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Print or Cut-and-Paste your Organovaite-Zn Specimen Label here :

Organovaite-Zn

K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O)
Dana No: 60.01.03h.02 Strunz No: 09.CE.30g
Locality:

Notes: