Gjerdingenite-Mn Mineral Data

Gjerdingenite-Mn Mineral Data

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General Gjerdingenite-Mn Information

Chemical Formula:

(K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O)

Composition:

Molecular Weight = 1,233.67 gm

Potassium 4.75 % K 5.73 % K₂O

Sodium 0.93 % Na 1.26 % Na₂O

Titanium 3.88 % Ti 6.47 % TiO₂

Manganese 3.34 % Mn 4.31 % MnO

Niobium 22.59 % Nb 32.32 % Nb₂O₅

Iron 1.13 % Fe 1.46 % FeO

Silicon 18.21 % Si 38.96 % SiO₂

Hydrogen 1.06 % H 9.49 % H₂O

Oxygen 44.09 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_1.5Na_0.5Mn²⁺_0.75Fe²⁺_0.25Nb₃Ti(Si₄O₁₂)₂O₃(OH)·6(H₂O)

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

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Gjerdingselva, Lunner, Oppland, Oslo Region, Norway. Link to MinDat.org Location Data.

Name Origin:

Named as the Mn-dominant analogue of gjerdingenite-Fe.

Synonym:

IMA2003-015

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Gjerdingenite-Mn Crystallography

Axial Ratios:

a:b:c =1.0431:1:0.5623

Cell Dimensions:

a = 14.563, b = 13.961, c = 7.851, Z = 2; beta = 117.62° V = 1,414.32 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): 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),

Crystal Structure:

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Raade G , Chukanov N V , Kolitsch U , Mockel S , Zadov A E , Pekov I V , European Journal of Mineralogy , 16 (2004) p.979-987, Gjerdingenite-Mn from Norway - a new mineral species, in the labuntsovite group: descriptive data and crystal structure, Locality: Gjerdingselva, Lunner, Oppland, Oslo Region, Norway

Physical Properties of Gjerdingenite-Mn

Color:

Orange yellow, Brownish yellow.

Diaphaniety:

Translucent to transparent

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Optical Properties of Gjerdingenite-Mn

Gladstone-Dale:

CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2448,KC= 0.2502

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

Electron Density:

r_electron=2.83 gm/cc
note: r_{Gjerdingenite-Mn}=2.90 gm/cc.

Fermion Index

Fermion Index = 0.01398
Boson Index = 0.98602

Photoelectric:

PE_{Gjerdingenite-Mn}= 35.83 barns/electron
U=PE_{Gjerdingenite-Mn} x r_electron= 101.28 barns/cc.

Radioactivity:

GRapi = 66.84 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Gjerdingenite-Mn - barely detectable

Gjerdingenite-Mn Classification

Dana Class:

60.1.3e.5 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.3e)Labuntsovite Group (Labuntsovite subgroup Monoclinic [C2/m])

60.1.3e.1 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

60.1.3e.2 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

60.1.3e.3 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

60.1.3e.4 Paratsepinite-Na! (Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8·n(H2O)n~8 C 2/m 2/m

60.1.3e.5 Gjerdingenite-Mn ! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

Strunz Class:

VIII/E.07-80 VIII - Silicates

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.07 - Labuntsovite Group

VIII/E.07-10 Korobitsynite! Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-20 Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-30* Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m

VIII/E.07-30 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m

VIII/E.07-32 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

VIII/E.07-33 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-34 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-40 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m

VIII/E.07-50 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m

VIII/E.07-50* Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8(H2O) Cm m

VIII/E.07-60* Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O) C 2/m 2/m

VIII/E.07-60 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2

VIII/E.07-70 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m

VIII/E.07-80 Gjerdingenite-Mn (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-90 Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-100 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m

VIII/E.07-110 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m

VIII/E.07-130 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16·n(H2O) I2/m 2/m

VIII/E.07-140 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-150 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-155 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

VIII/E.07-170 Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-180 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-190 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-200 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O) Cm m

VIII/E.07-205 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-210 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

VIII/E.07-220 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

Other Gjerdingenite-Mn Information

References:

NAME( EurJMin 16:979) PHYS. PROP.(EurJMin 16:979) OPTIC PROP.(EurJMin 16:979)

See Also:

Links to other databases for Gjerdingenite-Mn :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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

Gjerdingenite-Mn

(K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O)
Dana No: 60.1.3e.5 Strunz No: VIII/E.07-80
Locality:

Notes: