Litidionite Mineral Data

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:

Vesuvius, Campania, Italy. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek "LITHIDIOS" = lapilli, in allusion to the morphology.

Name Pronunciation:

Litidionite + Pronunciation

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= 0.056 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1941,KPDmeas= 0.204,KC= 0.2057
Ncalc = 1.57 - 1.59

Optical Data:

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

Calculated Properties of Litidionite

Electron Density:

Bulk Density (Electron Density)=2.69 gm/cc
note: Specific Gravity of Litidionite =2.75 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

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)
Concentration of Litidionite per GRapi unit = 0.72 (%)

Estimated Radioactivity from Litidionite - barely detectable

Litidionite Classification

Dana Class:

70.01.01.01 (70)Inosilicate Column or Tube Structures

(70.01)with columnar silicate units

(70.01.01)Litidionite group

70.01.01.01 Litidionite KNaCuSi4O10 P1 1

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

70.01.01.03 Manaksite KNaMnSi4O10 P1 1

70.01.01.04 Agrellite NaCa2Si4O10F P1 1

Strunz Class:

09.DG.07.0 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DG -Inosilicates with 3-periodic single and multiple chains

09.DG.07.0 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Ask about Litidionite here :
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Print or Cut-and-Paste your Litidionite Specimen Label here :

Litidionite

KNaCuSi4O10
Dana No: 70.01.01.01 Strunz No: 09.DG.07.0
Locality:

Notes: