Kuzmenkoite-Mn Mineral Data

General Kuzmenkoite-Mn Information

Chemical Formula:

(K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O)

Composition:

Molecular Weight = 1,095.05 gm

Potassium 6.07 % K 7.31 % K₂O

Sodium 0.63 % Na 0.85 % Na₂O

Titanium 15.74 % Ti 26.26 % TiO₂

Manganese 3.51 % Mn 4.53 % MnO

Niobium 3.39 % Nb 4.85 % Nb₂O₅

Iron 1.02 % Fe 1.31 % FeO

Silicon 20.52 % Si 43.90 % SiO₂

Hydrogen 1.24 % H 11.06 % H₂O

Oxygen 47.88 % O

______ ______

100.00 % 100.07 % = TOTAL OXIDE

Empirical Formula:

K_1.7Na_0.3Mn²⁺_0.7Fe²⁺_0.2Ti_3.6Nb_0.4Si₈O₂₄(OH)_4.1·4.67(H₂O)

Environment:

Late hydrothermal phase in minute cavities in albitized murmanite-bearing lujavrites. Also pseudomorphous after murmanite. Structurally related to labuntsovite.

IMA Status:

Approved IMA 2000 (Dana # Added)

Locality:

Mt. Flora (north ridge of Mt. Selsurt) in the northern part of the Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the Russian geochemist and mineralogist Maria V. Kuz'menko (1918-1995).

Synonym:

IMA1998-058

IMA2000-A

Kuzmenkoite

Kuzmenkoite-Mn Image

Images:

Kuzmenkoite-Mn

Comments: Yellowish brown kuzmenkoite-Mn crystals on matrix, with smaller, more brown colored labuntsovite-Mn.
Location: Mnt Flora, Lovozero, Kola, Russia. Scale: Sample Size 2x3 cm.
© Diederik Visser

Images:

Kuzmenkoite-Mn Calciohilairite

Comments: White rhombododecahedral crystals of calciohilairite associated with orange=brown stout prismatic kuzmenkoite-Mn on matrix.
Location: Flora Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: FOV ~1x1 cm.
© Pavel M. Kartashov

Kuzmenkoite-Mn Crystallography

Axial Ratios:

a:b:c =1.0332:1:1.0139

Cell Dimensions:

a = 14.369, b = 13.906, c = 14.1, Z = 4; beta = 117.09° V = 2,508.31 Den(Calc)= 2.90

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): 3.17(1)(421,402), 7(0.9)(001,020), 6.33(0.8)(201), 4.86(0.7)(021,111), 3.08(0.5)(022,041), 1.551(0.4)(843,173,82

Forms:

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Forms: ( 3 0 1) ( 0 1 0) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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Crystal Structure:

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Rastsvetaeva R K , Chukanov N V , Pekov I V , Crystallography Reports , 45 (2000) p.759-761, Refined crystal structure of kuzmenkoite, Locality: Lovozero massif, Kola Peninsula, Russia

Physical Properties of Kuzmenkoite-Mn

Cleavage:

{???} Imperfect

Color:

Yellow, Dark orange, Colorless.

Density:

2.67 - 2.97, Average = 2.82

Diaphaneity:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kuzmenkoite-Mn

Gladstone-Dale:

CI meas= 0.069 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.095 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2466,KPDmeas= 0.2535,KC= 0.2724
Ncalc = 1.73 - 1.81

Optical Data:

Biaxial (+), a=1.683, b=1.687, g=1.775, bire=0.0920

Calculated Properties of Kuzmenkoite-Mn

Electron Density:

Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Kuzmenkoite-Mn =2.82 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Kuzmenkoite-Mn}= 10.01 barns/electron
U=PE_{Kuzmenkoite-Mn} x r_electron= 27.93 barns/cc.

Radioactivity:

GRapi = 86.61 (Gamma Ray American Petroleum Institute Units)
Concentration of Kuzmenkoite-Mn per GRapi unit = 1.15 (%)

Estimated Radioactivity from Kuzmenkoite-Mn - barely detectable

Kuzmenkoite-Mn Classification

Dana Class:

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

(60.01)as Titanosilicates

(60.01.03c)Labuntsovite Group (Kuzmenkoite subgroup Monoclinic [C2/m])

60.01.03c.01 Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O) C 2/m 2/m

60.01.03c.02 Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4•6-8(H2O) Cm m

60.01.03c.03 Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m

60.01.03c.04 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m

Strunz Class:

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

09.C - Cyclosilicates

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

09.CE.30c Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m

09.CE.30c Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m

09.CE.30c Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4•6-8(H2O) Cm m

09.CE.30c Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O) C 2/m 2/m

09.CE.30c Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]•4(H2O) C 2/m 2/m

09.CE.30c Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m

09.CE.30c Gjerdingenite-Ca! K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O C 2/m 2/m

09.CE.30c Gjerdingenite-Na! (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O C 2/m 2/m

09.CE.30c Burovaite-Ca! (K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O C 2/m 2/m

Other Kuzmenkoite-Mn Information

References:

NAME( AmMin, vol 85, p 1562) PHYS. PROP.(AmMin, vol 85, p 1562) OPTIC PROP.(AmMin, vol 85, p 1562)

See Also:

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

Kuzmenkoite-Mn

(K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O)
Dana No: 60.01.03c.01 Strunz No: 09.CE.30c
Locality:

Notes: