Oyelite Mineral Data

Oyelite Mineral Data +

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General Oyelite Information

Chemical Formula:

Ca10B2Si8O29·12(H2O)

Composition:

Molecular Weight = 1,327.25 gm

Calcium 30.20 % Ca 42.25 % CaO

Silicon 16.93 % Si 36.22 % SiO₂

Boron 1.63 % B 5.25 % B₂O₃

Hydrogen 1.82 % H 16.29 % H₂O

Oxygen 49.42 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₁₀B₂Si₈O₂₉·12(H₂O)

Environment:

Metamorphosed limestones. In a vein cutting a spurrite zone of a spurrite-gehlenite skarn.

IMA Status:

Approved IMA 1984

Locality:

Fuka, Bichu, Okayama Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Jiro Oye (1900-1968), professor of mineralogy, Okayama University, Japan.

Oyelite Image

Images:

Oyelite Bultfonteinite

Comments: White encrustation of oyelite covering brownish botryoidal bultfonteinite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 2 x 4 cm.
© John Veevaert

Images:

Oyelite

Comments: Tufts of white acicular millimetric oyelite crystals on matrix.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Picture size 2 cm.
© Minernet

Oyelite Crystallography

Axial Ratios:

a:b:c =1.5517:1:2.822

Cell Dimensions:

a = 11.25, b = 7.25, c = 20.46, Z = 2; V = 1,668.77 Den(Calc)= 2.64

Crystal System:

OrthorhombicSpace Group: B****

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

By Intensity(I/I_o): 10.23(1), 2.917(0.6), 3.411(0.25),

Physical Properties of Oyelite

Color:

White.

Density:

2.62

Diaphaniety:

Transparent to Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Oyelite

Gladstone-Dale:

CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2299,KPDmeas= 0.2317,KC= 0.2307

Optical Data:

Biaxial (+), a=1.602, b=1.606, g=1.613, bire=0.0110

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Oyelite

Electron Density:

r_electron=2.68 gm/cc
note: r_Oyelite=2.64 gm/cc.

Fermion Index

Fermion Index = 0.01179
Boson Index = 0.98821

Photoelectric:

PE_Oyelite= 4.35 barns/electron
U=PE_Oyelite x r_electron= 11.68 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Oyelite is Not Radioactive

Oyelite Classification

Dana Class:

72.3.2.8 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings

(72.3)with 3-, 4-, or 5-membered rings and 8-membered rings

(72.3.2)Tobermorite group (5- & 8-membered rings)

72.3.2.1 Tobermorite Ca5Si6O16(OH)2·4(H2O) C 222₁ 2 2 2

72.3.2.2 Clinotobermorite Ca5Si6(O,OH)18·5(H2O) Cc,C 2/c Mono

72.3.2.3 Plombierite Ca5H2Si6O18·6(H2O)(?) C 222₁ 2 2 2

72.3.2.4 Riversideite Ca5Si6O16(OH)2·2(H2O) B2212 2 2 2

72.3.2.5 Okenite Ca3[Si6O15]·6(H2O) P1 or P1 Tri

72.3.2.6 Tacharanite Ca12Al2Si18O33(OH)36 A centered Mono

72.3.2.7 Nekoite Ca3Si6O15·7(H2O) P1 1

72.3.2.8 Oyelite Ca10B2Si8O29·12(H2O) B**** Ortho

Strunz Class:

VIII/D.19-10 VIII - Silicates

VIII/D - Unclassified silicates, mostly cations of big size Na, K, Ca, Sr, Pb

VIII/D.19 - Oyelite - Wawayandaite series

VIII/D.19-10 Oyelite Ca10B2Si8O29·12(H2O) B**** Ortho

VIII/D.19-20 Wawayandaite Ca12Mn4B2Be18Si12O46(OH,Cl)30[Ortho] P 2/c or Pc Mono

Other Oyelite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

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

Oyelite

Ca10B2Si8O29·12(H2O)
Dana No: 72.3.2.8 Strunz No: VIII/D.19-10
Locality:

Notes: