Mineralogy Database

Organovaite-Mn Mineral Data

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General Organovaite-Mn Information

Help on Chemical  Formula: Chemical Formula: K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O)
Help on Composition: Composition: Molecular Weight = 2,372.13 gm
   Potassium   3.79 %  K     4.57 % K2O
   Barium      1.16 %  Ba    1.29 % BaO
   Sodium      0.39 %  Na    0.52 % Na2O
   Calcium     0.84 %  Ca    1.18 % CaO
   Titanium    5.65 %  Ti    9.43 % TiO2
   Manganese   4.17 %  Mn    5.38 % MnO
   Niobium    20.76 %  Nb   29.69 % Nb2O5
   Aluminum    0.11 %  Al    0.21 % Al2O3
   Zinc        1.65 %  Zn    2.06 % ZnO
   Iron        0.24 %  Fe    0.30 % FeO
   Silicon    18.83 %  Si   40.27 % SiO2
   Hydrogen    0.59 %  H     5.32 % H2O
   Oxygen     41.82 %  O
             ______        ______ 
             100.00 %      100.24 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2.3Zn0.6Ca0.5Na0.4Ba0.2Mn2+1.8Fe2+0.1Nb5.3Ti2.8Si15.9Al0.1O54(OH)2�6(H2O)
Help on Environment: Environment: Alkaline pegmatites. Sometimes forms pseudomorphs after vuonnemite.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Mount Karnasurt, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Natalia Ivanovna Organova (1929-), Russian crystallographer and the Mn end-member.
Help on Synonym: Synonym: IMA2000-031

Organovaite-Mn Image

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Comments: Crude pink organovaite-Mn pseudomorphs after vuonnemite.
Location: Mt. Karnasurt, Lovozero, Kola Peninsula, Russia. Scale: Specimen Size 1.5x2.5 cm.
© Diederik Visser

Organovaite-Mn Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0392:1:1.1214
Help on Cell Dimensions: Cell Dimensions: a = 14.551, b = 14.001, c = 15.702, Z = 2; beta = 117.584° V = 2,835.33 Den(Calc)= 2.78
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.99(1)(020), 3.227(0.89)(422,400,4043.123(0.68)(042,024), 2.52(0.29)(442,402,406)4.936(0.28)(022), 2.607(0.25)(244,204,20 

Physical Properties of Organovaite-Mn

Help on Cleavage: Cleavage: None
Help on Color: Color: Rose brown, Pink, Yellow brown.
Help on Density: Density: 2.88
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pseudomorphous - Occurs in the form of another mineral.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Organovaite-Mn

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2578,KPDmeas= 0.2488,KC= 0.2474
Ncalc = 1.69 - 1.71
Help on Optical Data: Optical Data: Biaxial (+), a=1.683, b=1.692, g=1.775, bire=0.0920, 2V(Calc)=38, 2V(Meas)=40. Dispersion weak.

Calculated Properties of Organovaite-Mn

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Organovaite-Mn =2.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEOrganovaite-Mn = 39.27 barns/electron
U=PEOrganovaite-Mn x relectron= 109.44 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 52.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Organovaite-Mn per GRapi unit = 1.89 (%)

Estimated Radioactivity from Organovaite-Mn - barely detectable


Organovaite-Mn Classification

Help on  Dana Class: Dana Class: 60.01.03h.01 (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
Help on  Strunz Class: 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-Mn Information

Help on References: References: NAME( AmMin, v 87, p 1734) PHYS. PROP.(AmMin, v 87, p 1734) OPTIC PROP.(AmMin, v 87, p 1734)
Help on See Also: See Also: Links to other databases for Organovaite-Mn :
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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Dana No: 60.01.03h.01 Strunz No: 09.CE.30g





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