Lovdarite Mineral Data

Lovdarite Mineral Data +

We specialise in top quality, fine minerals from Morocco, Namibia,
South Africa, Pakistan, Democratic Republic of Congo (ZaÃƒï¿½Ã‚Â¯re) and China
Worldwide Fine Minerals by B & C GOBIN

General Lovdarite Information

Chemical Formula:

K2Na6Be4Si14O36·9(H2O)

Composition:

Molecular Weight = 1,383.50 gm

Potassium 5.65 % K 6.81 % K₂O

Sodium 9.97 % Na 13.44 % Na₂O

Beryllium 2.61 % Be 7.23 % BeO

Silicon 28.42 % Si 60.80 % SiO₂

Hydrogen 1.31 % H 11.72 % H₂O

Oxygen 52.04 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Na₆Be₄(Si₁₄O₃₆)·9(H₂O)

IMA Status:

Approved IMA 1973

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 69408

PDF 39-1367

Lovdarite Image

Images:

Lovdarite

Comments: Bright white crystal sprays of lovdarite on fine-grained white natrolite.
Location: Yubileinaya Pegmatite, Mount Karnasurt, Lovozero Massif, Kola Peninsula, Murmansk, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Lovdarite Crystallography

Axial Ratios:

a:b:c =5.7101:1:1.032

Cell Dimensions:

a = 39.576, b = 6.9308, c = 7.1526, Z = 2; V = 1,961.91 Den(Calc)= 2.34

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pma2

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.136(1), 3.288(1), 4.96(0.9),

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

Merlino S , European Journal of Mineralogy , 2 (1990) p.809-817, Lovdarite, K4Na12(Be8Si28O72).18H2O, a zeolite-like mineral:, structural features and OD character

Physical Properties of Lovdarite

Cleavage:

[100] Distinct, [010] Distinct, [001] Distinct

Color:

Colorless, Yellow, Yellowish white, White.

Density:

2.33

Diaphaniety:

Transparent to Translucent

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lovdarite

Gladstone-Dale:

CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2204,KPDmeas= 0.2213,KC= 0.2225

Optical Data:

Biaxial (+), a=1.513, b=1.516, g=1.518, bire=0.0050, 2V(Calc)=78, 2V(Meas)=90.

Calculated Properties of Lovdarite

Electron Density:

r_electron=2.34 gm/cc
note: r_Lovdarite=2.33 gm/cc.

Fermion Index

Fermion Index = 0.03958
Boson Index = 0.96042

Photoelectric:

PE_Lovdarite= 1.86 barns/electron
U=PE_Lovdarite x r_electron= 4.34 barns/cc.

Radioactivity:

GRapi = 81.84 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Lovdarite - barely detectable

Lovdarite Classification

Dana Class:

78.6.2.1 (78)Unclassified silicates

(78.6)possible tectosilicates

(78.6.2)Dana Group

78.6.2.1 Lovdarite K2Na6Be4Si14O36·9(H2O) Pma2 mm2

Strunz Class:

VIII/J.17-10 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.17 - Lovdarite series

VIII/J.17-05 Nabesite! Na2BeSi4O10·4(H2O) P 2₁2₁2₁ 2 2 2

VIII/J.17-10 Lovdarite K2Na6Be4Si14O36·9(H2O) Pma2 mm2

VIII/J.17-20 Gaultite Na4Zn2Si7O18·5(H2O) F2dd mm2

Other Lovdarite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Lovdarite using:

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

Visit our Advertisers for Lovdarite :
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 Lovdarite Mineral Data :

Ask about Lovdarite 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 Lovdarite Specimen Label here :

Lovdarite

K2Na6Be4Si14O36·9(H2O)
Dana No: 78.6.2.1 Strunz No: VIII/J.17-10
Locality:

Notes: