Diomignite Mineral Data

Diomignite Mineral Data +

General Diomignite Information

Chemical Formula:

Li2B4O7

Composition:

Molecular Weight = 169.12 gm

Lithium 8.21 % Li 17.67 % Li₂O

Boron 25.57 % B 82.33 % B₂O₃

Oxygen 66.22 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Li₂B₄O₇

IMA Status:

Approved IMA 1987

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 300010

PDF 18-717

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Diomignite Crystallography

Axial Ratios:

a:c = 1:1.08542

Cell Dimensions:

a = 9.47, c = 10.279, Z = 8; V = 921.83 Den(Calc)= 2.44

Crystal System:

Tetragonal - Ditetragonal PyramidalH-M Symbol (4mm) Space Group: I 4₁cd

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

By Intensity(I/I_o): 4.07(1), 2.662(0.6), 3.495(0.5),

Physical Properties of Diomignite

Color:

Colorless.

Diaphaniety:

Transparent

Streak:

white

Optical Properties of Diomignite

Gladstone-Dale:

CI calc= -0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2389,KC= 0.2313

Optical Data:

Uniaxial (-), e=1.554, w=1.612, bire=0.0580.

Calculated Properties of Diomignite

Electron Density:

r_electron=2.37 gm/cc
note: r_Diomignite=2.44 gm/cc.

Fermion Index

Fermion Index = 0.05735
Boson Index = 0.94265

Photoelectric:

PE_Diomignite= 0.33 barns/electron
U=PE_Diomignite x r_electron= 0.77 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Diomignite is Not Radioactive

Diomignite Classification

Dana Class:

24.5.4.1 (24)Borates - Anhydrous

(24.5)with miscellaneous formulae

(24.5.4)Dana Group

24.5.4.1 Diomignite Li2B4O7 I 4₁cd 4mm

Strunz Class:

V/H.10-10 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2-

V/H.10 - Diomignite - Borax series

V/H.10-10 Diomignite Li2B4O7 I 4₁cd 4mm

V/H.10-20 Tincalconite Na6[B4O5(OH)4]3·8(H2O) R 32 3 2

V/H.10-30 Borax Na2B4O5(OH)4·8(H2O) A2/a 2/m

Other Diomignite Information

References:

PHYS. PROP.(Am.Min.,Vol.73,p928,1988) OPTIC PROP.(Am.Min.,Vol.73,p928,1988)

See Also:

Links to other databases for Diomignite :
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 -École des Mines de Paris

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Print or Cut-and-Paste your Diomignite Specimen Label here :

Diomignite

Li2B4O7
Dana No: 24.5.4.1 Strunz No: V/H.10-10
Locality:

Notes: