Lemmleinite-K Mineral Data

Lemmleinite-K Mineral Data

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

General Lemmleinite-K Information

Chemical Formula:

NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O)

Composition:

Molecular Weight = 596.73 gm

Potassium 13.10 % K 15.79 % K₂O

Sodium 3.85 % Na 5.19 % Na₂O

Titanium 11.23 % Ti 18.74 % TiO₂

Niobium 9.34 % Nb 13.36 % Nb₂O₅

Silicon 18.83 % Si 40.28 % SiO₂

Hydrogen 0.74 % H 6.64 % H₂O

Oxygen 42.90 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaK₂Ti_1.4Nb_0.6Si₄O_13.6(OH)_0.4·2(H₂O)

Environment:

Found in hyperagpaitic pegmatites. The Ti-dominant analogue of nenadkevichite.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

Mount Koashava, Khibina alkaline massif, Kola Penninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Georgy G. Lemmlein (1901-1962), prominent Russian mineralogist and crystallographer.

Synonym:

IMA1997-003

IMA2000-A

Lemmleinite

Lemmleinite-K Image

Images:

Lemmleinite-K

Comments: Transparent, pyramidal crystals of lemmleinite-K on matrix.
Location: Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Lemmleinite-K Crystallography

Axial Ratios:

a:b:c =1.0352:1:0.5629

Cell Dimensions:

a = 14.39, b = 13.9, c = 7.825, Z = 4; beta = 117.6° V = 1,387.05 Den(Calc)= 2.86

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): 3.186(1)(402,421,400), 3.1(0.96)(041,022), 6.94(0.61)(020), 6.39(0.43)(201,200), 2.586(0.28)(241,202), 2.6(0.28)(242,203), 2.489(0.24)(40

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 0 4 1] [ 1 0 0] [ 2 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Physical Properties of Lemmleinite-K

Cleavage:

None

Color:

Colorless.

Density:

2.8

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Pseudo Orthorhombic - Crystals show an orthorhombic shape.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lemmleinite-K

Gladstone-Dale:

CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2501,KPDmeas= 0.2555,KC= 0.2566

Optical Data:

Biaxial (+), a=1.667, b=1.677, g=1.802, bire=0.1350

Calculated Properties of Lemmleinite-K

Electron Density:

r_electron=2.75 gm/cc
note: r_{Lemmleinite-K}=2.80 gm/cc.

Fermion Index

Fermion Index = 0.02353
Boson Index = 0.97647

Photoelectric:

PE_{Lemmleinite-K}= 17.42 barns/electron
U=PE_{Lemmleinite-K} x r_electron= 47.85 barns/cc.

Radioactivity:

GRapi = 185.57 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Lemmleinite-K - barely detectable

Lemmleinite-K Classification

Dana Class:

60.1.3d.1 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

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

60.1.3d.1 Lemmleinite-K ! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m

60.1.3d.2 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m

Strunz Class:

VIII/E.07-100 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 Lemmleinite-K Information

References:

NAME( MinRec, v 32, p 216) PHYS. PROP.(MinRec, v 32, p 216) OPTIC PROP.(MinRec, v 32, p 216)

See Also:

Links to other databases for Lemmleinite-K :
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 Lemmleinite-K using:

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

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

Translate Lemmleinite-K Mineral Data :

Ask about Lemmleinite-K 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 Lemmleinite-K Specimen Label here :

Lemmleinite-K

NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O)
Dana No: 60.1.3d.1 Strunz No: VIII/E.07-100
Locality:

Notes: