Manganokukisvumite Mineral Data
General Manganokukisvumite Information
Chemical Formula:
Na6MnTi4Si8O28•4(H2O)
Composition:
Molecular Weight = 1,130.79 gm
Potassium 0.17 % K 0.21 % K2 O
Sodium 11.81 % Na 15.92 % Na2 O
Calcium 0.07 % Ca 0.10 % CaO
Cerium 0.12 % Ce 0.15 % Ce2 O3
Magnesium 0.15 % Mg 0.25 % MgO
Titanium 16.43 % Ti 27.41 % TiO2
Manganese 4.32 % Mn 5.58 % MnO
Niobium 0.49 % Nb 0.71 % Nb2 O5
Aluminum 0.10 % Al 0.18 % Al2 O3
Iron 0.44 % Fe 0.57 % FeO
Silicon 19.89 % Si 42.56 % SiO2
Hydrogen 0.71 % H 6.37 % H2 O
Oxygen 45.28 % O
______ ______
100.00 % 100.01 % = TOTAL OXIDE
Empirical Formula:
Na5.81 K0.05 Ca0.02 Ce0.01 Mn2+ 0.89 Fe2+ 0.09 Mg0.07 Al0.04 Ti3.88 Nb0.06 Si8.01 O28 �4(H2 O)
Environment:
Small cavities in albite-rich syenite breccia. Mn-dominanat analogue of kukisvumite and closely related to lintisite.
IMA Status:
Approved IMA 2004 (Dana # Added)
Locality:
Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.
Name Origin:
Named as the manganese-dominant analogue of kukisvumite.
Synonym:
IMA2002-029
Manganokukisvumite Image
Images:
Manganokukisvumite Crystallography
Axial Ratios:
a:b:c =3.3732:1:0.6061
Cell Dimensions:
a = 29.05, b = 8.612, c = 5.22, Z = 2; V = 1,305.93 Den(Calc)= 2.88
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pccn
X Ray Diffraction:
By Intensity(I/Io ): 14.47(1)(200), 3.025(0.4)(910), 2.881(0.2)(521), 6.43(0.2)(310), 4.83(0.1)(600), 2.146(0.1)(930), 2.458(0.1)(402), 2.591(0.1)(721), 3.743(0.1)(701),
Physical Properties of Manganokukisvumite
Cleavage:
None
Color:
Colorless.
Density:
2.86
Diaphaneity:
Transparent
Fracture:
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Manganokukisvumite
Gladstone-Dale:
CI meas = 0.031 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = 0.038 (Excellent) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2538,KPDmeas = 0.2556,KC = 0.2638 Ncalc = 1.75 - 1.76
Optical Data:
Biaxial (-), a=1.657, b=1.741-1.747, g=1.789-1.795, bire=0.1320-0.1380, 2V(Calc)=68-70, 2V(Meas)=70. Dispersion dispersion not observed.
Calculated Properties of Manganokukisvumite
Electron Density:
Bulk Density (Electron Density)=2.81 gm/cc note: Specific Gravity of Manganokukisvumite =2.86 gm/cc.
Fermion Index:
Fermion Index = 0.03 Boson Index = 0.97
Photoelectric:
PEManganokukisvumite = 6.18 barns/electronU=PEManganokukisvumite x r electron = 17.38 barns/cc.
Radioactivity:
GRapi = 132.37 (Gamma Ray American Petroleum Institute Units)
Concentration of Manganokukisvumite per GRapi unit = 0.76 (%)
Estimated Radioactivity from Manganokukisvumite - barely detectable
Manganokukisvumite Classification
Dana Class:
65.01.06.04 (65) Inosilicate Single-Width Unbranched Chains, W=1
(65.01) with chains P=2
(65.01.06) Lorenzenite group
65.01.06.01 Lorenzenite Na2Ti2Si2O9 P bcn 2/m 2/m 2/m
65.01.06.02 Kukisvumite Na6ZnTi4Si8O28•4(H2O) Pccn 2/m 2/m 2/m
65.01.06.03 Lintisite Na3LiTi2Si4O14•2(H2O) C 2/c 2/m
65.01.06.04 Manganokukisvumite ! Na6MnTi4Si8O28•4(H2O) Pccn 2/m 2/m 2/m
65.01.06.05 Punkaruaivite ! Li{Ti2(OH)2[Si4O11(OH)]}•H2O C 2/c 2/m
Strunz Class:
09.DB.20 09 - SILICATES (Germanates)
09.D - Inosilicates* Structural terminology according to Liebau (1985)
09.DB -Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
09.DB.20 Kukisvumite Na6ZnTi4Si8O28•4(H2O) Pccn 2/m 2/m 2/m
09.DB.20 Manganokukisvumite ! Na6MnTi4Si8O28•4(H2O) Pccn 2/m 2/m 2/m
Other Manganokukisvumite Information
References:
NAME( CanMin, v 42, p 781) PHYS. PROP.(CanMin, v 42, p 781) OPTIC PROP.(CanMin, v 42, p 781)
See Also:
Links to other databases for Manganokukisvumite :
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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Manganokukisvumite
Na6MnTi4Si8O28•4(H2O)
Dana No: 65.01.06.04 Strunz No: 09.DB.20
Locality:
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