Gutkovaite-Mn Mineral Data

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General Gutkovaite-Mn Information

Chemical Formula:

CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4•5(H2O)

Composition:

Molecular Weight = 1,243.09 gm

Potassium 5.19 % K 6.25 % K₂O

Barium 0.88 % Ba 0.99 % BaO

Sodium 0.13 % Na 0.17 % Na₂O

Strontium 7.47 % Sr 8.84 % SrO

Calcium 3.22 % Ca 4.51 % CaO

Magnesium 0.10 % Mg 0.16 % MgO

Zirconium 0.07 % Zr 0.10 % ZrO₂

Titanium 13.83 % Ti 23.07 % TiO₂

Manganese 3.62 % Mn 4.68 % MnO

Niobium 3.36 % Nb 4.81 % Nb₂O₅

Aluminum 0.09 % Al 0.16 % Al₂O₃

Zinc 0.11 % Zn 0.13 % ZnO

Iron 0.45 % Fe 0.58 % FeO

Silicon 18.07 % Si 38.67 % SiO₂

Hydrogen 0.91 % H 8.17 % H₂O

Oxygen 42.49 % O

______ ______

100.00 % 101.29 % = TOTAL OXIDE

Empirical Formula:

CaNa_0.07K_1.65Ba_0.08Sr_1.06Mn²⁺_0.82Fe²⁺_0.1Mg_0.05Zn_0.02Ti_3.59Nb_0.45Zr_0.01Si₈Al_0.04O_24.14 O_2.47(OH)_1.53·4.87(H₂O)

Environment:

Pegmitite within nepheline syenite. (labuntosovite group; structure)

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Mooount Maly Mannepakhk, Khibiny alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for N. N. Gukova (1896-1960?), Russian mineralogist..

Synonym:

IMA2001-038

Gutkovaite-Mn Image

Images:

Gutkovaite-Mn

Comments: Pale pink gutkovaite-(Mn) in matrix.
Location: Malyi Mannepakhk Mt., Chibiny, Kola, Russia. Scale: Specimen Size 1.5x2 cm.
© Diederik Visser

Gutkovaite-Mn Crystallography

Axial Ratios:

a:b:c =1.0295:1:0.5587

Cell Dimensions:

a = 14.3, b = 13.889, c = 7.76, Z = 2; beta = 117.51° V = 1,366.97 Den(Calc)= 3.02

Crystal System:

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

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

By Intensity(I/I_o): 3.05(1)(241,240), 3.22(0.9)(421,402,400), 7(0.7)(020,001), 2.48(0.6)(441,403,401), 2.57(0.5)(242,241), 6.33(0.5)(201,200), 1.428(0.3), 1

Physical Properties of Gutkovaite-Mn

Cleavage:

None

Color:

Pale yellowish pink.

Density:

2.83

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Gutkovaite-Mn

Gladstone-Dale:

CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2421,KPDmeas= 0.2583,KC= 0.2593
Ncalc = 1.73 - 1.78

Optical Data:

Biaxial (+), a=1.688, b=1.7, g=1.805, bire=0.1170, 2V(Calc)=40, 2V(Meas)=35. Dispersion dispersion not observed.

Calculated Properties of Gutkovaite-Mn

Electron Density:

Bulk Density (Electron Density)=2.76 gm/cc
note: Specific Gravity of Gutkovaite-Mn =2.83 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Gutkovaite-Mn}= 21.70 barns/electron
U=PE_{Gutkovaite-Mn} x r_electron= 59.97 barns/cc.

Radioactivity:

GRapi = 73.09 (Gamma Ray American Petroleum Institute Units)
Concentration of Gutkovaite-Mn per GRapi unit = 1.37 (%)

Estimated Radioactivity from Gutkovaite-Mn - barely detectable

Gutkovaite-Mn Classification

Dana Class:

60.01.03f.01 (60)Cyclosilicate Four-Membered Rings

(60.01)as Titanosilicates

(60.01.03f)Labuntsovite Group (Gutkovaite subgroup Monoclinic [Cm])

60.01.03f.01 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4•5(H2O) Cm m

60.01.03f.02 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m

60.01.03f.03 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4•6(H2O) Cm m

Strunz Class:

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

09.C - Cyclosilicates

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

09.CE.30h Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4•5(H2O) Cm m

09.CE.30h Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m

09.CE.30h Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4•6(H2O) Cm m

Other Gutkovaite-Mn Information

References:

NAME( AmMin, v 88, p 931) PHYS. PROP.(AmMin, v 88, p 931) OPTIC PROP.(AmMin, v 88, p 931)

See Also:

Links to other databases for Gutkovaite-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 Gutkovaite-Mn Specimen Label here :

Gutkovaite-Mn

CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4•5(H2O)
Dana No: 60.01.03f.01 Strunz No: 09.CE.30h
Locality:

Notes: