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 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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