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Gjerdingenite-Mn Mineral Data

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General Gjerdingenite-Mn Information

Help on Chemical  Formula: Chemical Formula: (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O)
Help on Composition: Composition: Molecular Weight = 2,494.47 gm
   Potassium   4.81 %  K     5.80 % K2O
   Barium      0.61 %  Ba    0.68 % BaO
   Sodium      1.07 %  Na    1.44 % Na2O
   Magnesium   0.03 %  Mg    0.05 % MgO
   Titanium    4.20 %  Ti    7.01 % TiO2
   Manganese   2.00 %  Mn    2.59 % MnO
   Niobium    22.05 %  Nb   31.54 % Nb2O5
   Aluminum    0.10 %  Al    0.18 % Al2O3
   Zinc        0.42 %  Zn    0.52 % ZnO
   Iron        1.57 %  Fe    2.02 % FeO
   Silicon    17.91 %  Si   38.32 % SiO2
   Hydrogen    1.10 %  H     9.85 % H2O
   Oxygen     44.13 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3.07Na1.16Ba0.11Mn2+0.91Fe2+0.7Zn0.16Mg0.03Nb5.92Ti2.19Si15.91Al0.09O48O6.32(OH)1.68 (H2O)12.8
Help on Environment: Environment: Miarolitic cavities of a sodic granite ('ekerite') . Mn-dominant analogue of gjerdingenite-Fe, the Ti analogue of kuzmenkoite-Mn and a dimorph of organovaite-Mn. Labuntsovite group
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Gjerdingselva, Lunner, Oppland, Oslo Region, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Mn-dominant analogue of gjerdingenite-Fe.
Help on Synonym: Synonym: IMA2003-015

Gjerdingenite-Mn Image

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  Gjerdingenite-Mn   Elpidite

Comments: Golden brown crystal of gjerdingenite-Mn, in white elpidite.
Location: Gjerdingselva (Gjerdingen), Nordmarka, Lunner, Oppland, Norway. Scale: Crystal Size 0.02 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Gjerdingenite-Mn Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0431:1:0.5623
Help on Cell Dimensions: Cell Dimensions: a = 14.563, b = 13.961, c = 7.851, Z = 2; beta = 117.62° V = 1,414.32 Den(Calc)= 5.86
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.96(1)(020,001), 3.22(0.9)(421,400,402), 3.1(0.8)(041,022),4.94(0.8)(021), 2.51(0.4)(441,401,403,06.4(0.2),

Physical Properties of Gjerdingenite-Mn

Help on Cleavage: Cleavage: None
Help on Color: Color: Orange yellow, Brownish yellow.
Help on Diaphaneity: Diaphaneity: Translucent to transparent
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 Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Gjerdingenite-Mn

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.516 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1212,KC= 0.2505
Ncalc = 2.47
Help on Optical Data: Optical Data: Biaxial (+), a=1.67, b=1.685, g=1.775, bire=0.1050, 2V(Calc)=48, 2V(Meas)=52. Dispersion r < v weak.

Calculated Properties of Gjerdingenite-Mn

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.71 gm/cc
note: Specific Gravity of Gjerdingenite-Mn =5.86 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGjerdingenite-Mn = 37.58 barns/electron
U=PEGjerdingenite-Mn x relectron= 214.68 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 67.68 (Gamma Ray American Petroleum Institute Units)
Concentration of Gjerdingenite-Mn per GRapi unit = 1.48 (%)

Estimated Radioactivity from Gjerdingenite-Mn - barely detectable


Gjerdingenite-Mn Classification

Help on  Dana Class: Dana Class: 60.01.03e.05 (60)Cyclosilicate Four-Membered Rings
  (60.01)as Titanosilicates
  (60.01.03e)Labuntsovite Group (Labuntsovite subgroup Monoclinic [C2/m])
60.01.03e.01 Labuntsovite-Mn! Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O),n=10-12 I2/m 2/m
60.01.03e.02 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m
60.01.03e.03 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m
60.01.03e.04 Paratsepinite-Na! (Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O)n~8 C 2/m 2/m
60.01.03e.05 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m
60.01.03e.06 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]•4(H2O) C 2/m 2/m
60.01.03e.07 Gjerdingenite-Ca! K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O C 2/m 2/m
60.01.03e.08 Gjerdingenite-Na! (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O C 2/m 2/m
Help on  Strunz Class: 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 Gjerdingenite-Mn Information

Help on References: References: NAME( EurJMin 16:979) PHYS. PROP.(EurJMin 16:979) OPTIC PROP.(EurJMin 16:979)
Help on See Also: See Also: Links to other databases for Gjerdingenite-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: 60.01.03e.05 Strunz No: 09.CE.30c





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