Gjerdingenite-Fe Mineral Data

Gjerdingenite-Fe Mineral Data

General Gjerdingenite-Fe Information

Chemical Formula:

K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O)

Composition:

Molecular Weight = 1,242.18 gm

Potassium 6.30 % K 7.58 % K₂O

Titanium 3.85 % Ti 6.43 % TiO₂

Manganese 1.11 % Mn 1.59 % Mn₂O₃

Niobium 22.44 % Nb 32.10 % Nb₂O₅

Iron 3.37 % Fe 4.82 % Fe₂O₃

Silicon 18.09 % Si 38.70 % SiO₂

Hydrogen 1.05 % H 9.43 % H₂O

Oxygen 43.79 % O

______ ______

100.00 % 100.64 % = TOTAL OXIDE

Empirical Formula:

K₂(H₂O)₂Fe³⁺_0.75Mn³⁺_0.25Nb₃Ti(Si₄O₁₂)₂O₃(OH)·4(H₂O)

Environment:

Found in miarolitic cavities in ekerite, a sodic granite. (labuntosovite group; structure)

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Gjerdingselva, Lunnar, Pooland, Norway. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

IMA2001-009

Gjerdingenite-Fe Image

Images:

Gjerdingenite-Fe

Comments: Brown crystals of gjerdingenite-Fe on matrix.
Location: Gjerdingen, Vestbygda, Nordmarka, Jevnaker, Oppland, Norway. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Gjerdingenite-Fe Ralstonite

Comments: SEM photomicrograph of gjerdingenite-Fe. The mineral is dusted with tiny crystals of two phases. At high magnification, one of them is seen to form cubes and is probably ralstonite.
Location: Gjerdingselva, Lunner, Oppland, Oslo Region, Norway. Scale: Crystal length 0.5 mm.
© Canadian Mineralogist

Gjerdingenite-Fe Crystallography

Axial Ratios:

a:b:c =1.042:1:0.562

Cell Dimensions:

a = 14.529, b = 13.943, c = 7.837, Z = 2; beta = 117.61° V = 1,406.81 Den(Calc)= 2.93

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): 3.225(1)(421,400,402), 6.92(0.8)(020,001), 4.94(0.7)(021), 3.114(0.67)(041,022), 2.512(0.5)(441,401,403)6.42(0.5)(200,201),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Raade G , Ferraris G , Gula A , Ivaldi G , The Canadian Mineralogist , 40 (2002) p.1629-1639, Gjerdingenite-Fe from Norway, a new mineral species, in the labuntsovite group: Description, crystal, structure and twinning, Locality: Norway

Physical Properties of Gjerdingenite-Fe

Cleavage:

None

Color:

Pale yellow, Yellow, Yellow orange.

Density:

2.82

Diaphaniety:

Translucent to transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous - Waxy

Streak:

faint yellowish white

Optical Properties of Gjerdingenite-Fe

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2459,KPDmeas= 0.2555,KC= 0.2587

Optical Data:

Biaxial (+), a=1.6676, b=1.7001, g=1.794, bire=0.1264, 2V(Calc)=64, 2V(Meas)=58.5. Dispersion dispersion not observed.

Calculated Properties of Gjerdingenite-Fe

Electron Density:

r_electron=2.75 gm/cc
note: r_{Gjerdingenite-Fe}=2.82 gm/cc.

Fermion Index

Fermion Index = 0.01436
Boson Index = 0.98564

Photoelectric:

PE_{Gjerdingenite-Fe}= 35.82 barns/electron
U=PE_{Gjerdingenite-Fe} x r_electron= 98.51 barns/cc.

Radioactivity:

GRapi = 88.57 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Gjerdingenite-Fe - barely detectable

Gjerdingenite-Fe Classification

Dana Class:

60.1.3.1 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.3)Labuntsovite Group (Unclassified)

60.1.3.1 Gjerdingenite-Fe ! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m

60.1.3.2 IMA2004-008! (Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

Strunz Class:

VIII/E.07-70 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-Fe Information

References:

NAME( CanMin, v 41, p 810) PHYS. PROP.(CanMin, v 41, p 810) OPTIC PROP.(CanMin, v 41, p 810)

See Also:

Links to other databases for Gjerdingenite-Fe :
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

Search for Gjerdingenite-Fe using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Gjerdingenite-Fe :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Gjerdingenite-Fe Mineral Data :

Ask about Gjerdingenite-Fe here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Gjerdingenite-Fe

K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O)
Dana No: 60.1.3.1 Strunz No: VIII/E.07-70
Locality:

Notes: