Organovaite-Mn Mineral Data

General Organovaite-Mn Information

Chemical Formula:

K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O)

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

Empirical Formula:

K_2.3Zn_0.6Ca_0.5Na_0.4Ba_0.2Mn²⁺_1.8Fe²⁺_0.1Nb_5.3Ti_2.8Si_15.9Al_0.1O₅₄(OH)₂·6(H₂O)

Environment:

Alkaline pegmatites. Sometimes forms pseudomorphs after vuonnemite.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

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

Name Origin:

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

Synonym:

IMA2000-031

Organovaite-Mn Image

Images:

Organovaite-Mn

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

Axial Ratios:

a:b:c =1.0392:1:1.1214

Cell Dimensions:

a = 14.551, b = 14.001, c = 15.702, Z = 2; beta = 117.584° V = 2,835.33 Den(Calc)= 2.78

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cm

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

By Intensity(I/I_o): 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

Cleavage:

None

Color:

Rose brown, Pink, Yellow brown.

Density:

2.88

Diaphaneity:

Transparent to 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-Mn

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

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

Electron Density:

Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Organovaite-Mn =2.88 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Organovaite-Mn}= 39.27 barns/electron
U=PE_{Organovaite-Mn} x r_electron= 109.44 barns/cc.

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

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

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

References:

NAME( AmMin, v 87, p 1734) PHYS. PROP.(AmMin, v 87, p 1734) OPTIC PROP.(AmMin, v 87, p 1734)

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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Print or Cut-and-Paste your Organovaite-Mn Specimen Label here :

Organovaite-Mn

K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O)
Dana No: 60.01.03h.01 Strunz No: 09.CE.30g
Locality:

Notes: