Oyelite
A valid IMA mineral species
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About Oyelite
Dr. Jiro Oye
Formula:
Ca10Si8B2O29 · 12.5H2O
Colour:
White, pale tan
Lustre:
Sub-Vitreous, Silky, Dull
Hardness:
5
Specific Gravity:
2.62
Crystal System:
Triclinic
Name:
Named in 1984 by Isao Kusachi, Chiyoko Henmi, and Kitinosuke Henmi in honor of Dr. Jiro Oye (大江二郎) (1900-1968), professor of mineralogy at Okayama University. The mineral was previously reported as tobermorite-10Å.
Unique Identifiers
Mindat ID:
3053
Long-form identifier:
mindat:1:1:3053:9
IMA Classification of Oyelite
Approved
IMA Formula:
Ca5BSi4O13(OH)3(H2O)4
Approval year:
1980
Classification of Oyelite
9.HA.80
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
72.3.2.8
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
3 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
3 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
17.5.14
17 : Silicates Containing other Anions
5 : Borosilicates
17 : Silicates Containing other Anions
5 : Borosilicates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Oye | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Oyelite
Sub-Vitreous, Silky, Dull
Transparency:
Transparent, Translucent
Colour:
White, pale tan
Streak:
White
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Fracture:
Splintery
Density:
2.62 g/cm3 (Measured)
Optical Data of Oyelite
Type:
Biaxial (+)
RI values:
nα = 1.602 nβ = 1.606 nγ = 1.613
Birefringence:
0.011
Max. Birefringence:
δ = 0.011
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (74°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
No measured or calculated 2V is on file for this mineral, so the value used here (74°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Dispersion:
strong
Chemistry of Oyelite
Mindat Formula:
Ca10Si8B2O29 · 12.5H2O
Element Weights:
Common Impurities:
Al,Na,C
Crystallography of Oyelite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.2557(5) Å, b = 10.7390(11) Å, c = 11.2399(8) Å
α = 89.432(7)°, β = 89.198(6)°, γ = 72.097(8)°
α = 89.432(7)°, β = 89.198(6)°, γ = 72.097(8)°
Ratio:
a:b:c = 0.676 : 1 : 1.047
Unit Cell V:
833.30 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Acicular crystals, often in radial aggregates
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.23 Å | (100) |
| 5.92 Å | (3) |
| 5.62 Å | (3) |
| 5.12 Å | (4) |
| 4.92 Å | (6) |
| 3.784 Å | (10) |
| 3.411 Å | (25) |
| 3.316 Å | (1) |
| 3.069 Å | (6) |
| 2.917 Å | (60) |
| 2.813 Å | (6) |
| 2.558 Å | (15) |
| 2.464 Å | (4) |
| 2.327 Å | (7) |
| 2.167 Å | (2) |
| 2.046 Å | (13) |
| 1.872 Å | (2) |
| 1.814 Å | (2) |
Comments:
Kusachi I, Henmi C, Henmi K (1981) New mineral oyelite. Mineralogical Society of Japan, Annual Meeting Abstracts 1981, 132-132.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 51 : Pyrometamorphic minerals (see also #54 and #56) | <0.36 |
Type Occurrence of Oyelite
Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan (M23576); National Museum of Natural History, Washington, D.C., USA (148213).
Associated Minerals at Type Locality:
Synonyms of Oyelite
Other Language Names for Oyelite
Common Associates
Associations Based on Photo Data:
| 79 photos of Oyelite associated with Calcite | CaCO3 |
| 58 photos of Oyelite associated with Olmiite | CaMn2+[SiO3(OH)](OH) |
| 56 photos of Oyelite associated with Ettringite | Ca6Al2(SO4)3(OH)12 · 26H2O |
| 26 photos of Oyelite associated with Bultfonteinite | Ca2(HSiO4)F · H2O |
| 16 photos of Oyelite associated with Hematite | Fe2O3 |
| 14 photos of Oyelite associated with Andradite | Ca3Fe3+2(SiO4)3 |
| 12 photos of Oyelite associated with Jouravskite | Ca3Mn4+(SO4)(CO3)(OH)6 · 12H2O |
| 10 photos of Oyelite associated with Hausmannite | Mn2+Mn3+2O4 |
| 10 photos of Oyelite associated with Gaudefroyite | Ca4Mn3+2-3(BO3)3(CO3)(O,OH)3 |
| 9 photos of Oyelite associated with Baryte | BaSO4 |
Related Minerals - Strunz-mindat Grouping
| 9.HA. | Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
| 9.HA. | Kalyuzhnyite-(Ce) | NaKCaSrCeTi(Si8O21)OF(H2O)3 |
| 9.HA. | Moragite | Ca3TiSi2(Al2Si)O14 |
| 9.HA.05 | Ertixiite | Na2Si4O9 |
| 9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O |
| 9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 |
| 9.HA.25 | Magbasite | KBaFe3+Mg7Si8O22(OH)2F6 |
| 9.HA.35 | Demagistrisite | BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4 · 3H2O |
| 9.HA.37 | Donwilhelmsite | CaAl4Si2O11 |
| 9.HA.40 | Kasatkinite | Ba2Ca8B5Si8O32(OH)3 · 6H2O |
| 9.HA.40 | 'Igumnovite' | Ca3Al2[SiO4]2[◻Cl4] |
| 9.HA.42 | Paqueite | Ca3TiSi2(Al,Ti,Si)3O14 |
| 9.HA.42 | Qeltite | Ca3TiSi2(Fe3+2Si)O14 |
| 9.HA.45 | Rippite | K2(Nb,Ti)2(Si4O12)O(O,F) |
| 9.HA.47 | Zagamiite | CaAl2Si3.5O11 |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O |
| 9.HA.50 | 'α-Carnegieite' | NaAlSiO4 |
| 9.HA.52 | 'Atheriastite' | near Ca5MgFeAl6Si8O32 · 5H2O |
| 9.HA.55 | 'Foshallasite' | Ca3[Si2O7] · 3H2O(?) |
| 9.HA.57 | 'Bhreckite' | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 |
| 9.HA.65 | Caryochroite | [Na(Sr0.5Ca0.5)Mg]3[Fe3+8Mn(Fe2+0.5◻0.5)]10(Ti2Si12O37)(OH)14(H2O)3 |
| 9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near |
| 9.HA.75 | Tacharanite | Ca12Al2Si18O33(OH)36 |
| 9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x) · 2H2O |
| 9.HA.90 | Tiettaite | K4Na12Fe3+Si16O41(OH)4 · 2H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Oyelite
mindat.org URL:
https://www.mindat.org/min-3053.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Oyelite
Reference List:
Kusachi, Isao, Henmi, Chiyoko, Henmi, Kitinosuke (1980) 10Å Tobermorite from Fuka, the Town of Bitchu, Okayama Prefecture. Journal of the Mineralogical Society of Japan, 14 (5) 314-322 doi:10.2465/gkk1952.14.314
Kusachi, Isao, Henmi, Chiyoko, Henmi, Kitinosuke (1984) An oyelite-bearing vein at Fuka, the town of Bitchu, Okayama Prefecture. The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 79 (7) 267-275 doi:10.2465/ganko1941.79.267
Dunn, Pete J., Chao, George Y., Fitzpatrick, Joan J., Langley, Richard H., Fleischer, Michael, Zilczer, Janet A. (1986) New Mineral Names. American Mineralogist, 71 (1-2). 227-232 p.230
Pekov, Igor V., Zubkova, Natalia V., Chukanov, Nikita V., Yapaskurt, Vasiliy O., Britvin, Sergey N., Kasatkin, Anatoly V., Pushcharovsky, Dmitry Y. (2019) Oyelite: new mineralogical data, crystal structure model and refined formula Ca5BSi4O13(OH)3·4H2O. European Journal of Mineralogy, 31 (3) 595-608 doi:10.1127/ejm/2019/0031-2848
Localities for Oyelite
Showing 8 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
China | |
| Möhn et al. (05/2021) |
Japan | |
| Minakawa et al. (1986) |
| Journal of the Mineralogical Society of Japan (1980) +2 other references |
Middle East | |
| Gross (1977) | |
South Africa | |
| Pohl et al. (1991) |
| Cairncross et al. (1995) | |
| King (n.d.) | |
USA | |
| Kusachi et al. (1980) |
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