Litidionite Mineral Data

Litidionite Mineral Data +

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General Litidionite Information

Chemical Formula:

KNaCuSi4O10

Composition:

Molecular Weight = 397.97 gm

Potassium 9.82 % K 11.83 % K₂O

Sodium 5.78 % Na 7.79 % Na₂O

Copper 15.97 % Cu 17.98 % Cu₂O

Silicon 28.23 % Si 60.39 % SiO₂

Oxygen 40.20 % O

______ ______

100.00 % 97.99 % = TOTAL OXIDE

Empirical Formula:

KNaCuSi₄O₁₀

IMA Status:

Valid Species (Pre-IMA) 1880

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 4362

Lithidionite

PDF 29-1041

Litidionite Image

Images:

Litidionite

Comments: Bright blue crystalline litidionite fragment.
Location: Vesuvius, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Litidionite Crystallography

Axial Ratios:

a:b:c =1.2234:1:0.8701

Cell Dimensions:

a = 9.8, b = 8.01, c = 6.97, Z = 2; alpha = 114.12°, beta = 99.52°, gamma = 105.59° V = 474.37 Den(Calc)= 2.79

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.37(1), 2.409(0.85), 3.22(0.75),

Crystal Structure:

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Pozas J M M , Rossi G , Tazzoli V , American Mineralogist , 60 (1975) p.471-474, Re-examination and crystal structure analysis of litidionite

Physical Properties of Litidionite

Color:

Blue, White.

Density:

2.75

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

bluish white

Optical Properties of Litidionite

Gladstone-Dale:

CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2011,KPDmeas= 0.204,KC= 0.2057

Optical Data:

Biaxial (-), a=1.548, b=1.574, , 2V(Meas)=56.

Calculated Properties of Litidionite

Electron Density:

r_electron=2.69 gm/cc
note: r_Litidionite=2.75 gm/cc.

Fermion Index

Fermion Index = 0.01338
Boson Index = 0.98662

Photoelectric:

PE_Litidionite= 9.04 barns/electron
U=PE_Litidionite x r_electron= 24.36 barns/cc.

Radioactivity:

GRapi = 138.92 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Litidionite - barely detectable

Litidionite Classification

Dana Class:

70.1.1.1 (70)Inosilicate Column or Tube Structures

(70.1)with columnar silicate units

(70.1.1)Dana Group

70.1.1.1 Litidionite KNaCuSi4O10 P1 1

70.1.1.2 Fenaksite (K,Na,Ca)4(Fe,Fe,Mn)2Si8O20(OH,F) P1 1

70.1.1.3 Manaksite KNaMnSi4O10 P1 1

70.1.1.4 Agrellite NaCa2Si4O10F P1 1

Strunz Class:

VIII/F.39-10 VIII - Silicates

VIII/F - Inosilicates (chain and band) complex chain structure. Cylindric chains and others

VIII/F.39 - Sverigeite series

VIII/F.39-10 Litidionite KNaCuSi4O10 P1 1

Other Litidionite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Litidionite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Litidionite

KNaCuSi4O10
Dana No: 70.1.1.1 Strunz No: VIII/F.39-10
Locality:

Notes: