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Ca10Si8B2O29 · 12.5H2O
Crystal System:
Named in honor of Dr. Jiro Oye (1900-1968), professor of mineralogy at Okayama University. The mineral was previously reported as tobermorite-10Å.
Related to tobermorite.

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Classification of OyeliteHide


9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements

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 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of OyeliteHide


Optical Data of OyeliteHide

Biaxial (+)
RI values:
nα = 1.602 nβ = 1.606 nγ = 1.613
Max Birefringence:
δ = 0.011
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of OyeliteHide

Ca10Si8B2O29 · 12.5H2O
IMA Formula:
Ca10B2Si8O29 · 12H2O
Common Impurities:

Crystallography of OyeliteHide

Crystal System:
Cell Parameters:
a = 11.25 Å, b = 7.25 Å, c = 20.46 Å
a:b:c = 1.552 : 1 : 2.822
Unit Cell V:
1,668.77 ų (Calculated from Unit Cell)

Type Occurrence of OyeliteHide

Synonyms of OyeliteHide

Other Language Names for OyeliteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite51 photos of Oyelite associated with Calcite on
Ettringite39 photos of Oyelite associated with Ettringite on
Olmiite28 photos of Oyelite associated with Olmiite on
Bultfonteinite17 photos of Oyelite associated with Bultfonteinite on
Hematite10 photos of Oyelite associated with Hematite on
Manganvesuvianite5 photos of Oyelite associated with Manganvesuvianite on
Andradite5 photos of Oyelite associated with Andradite on
Gaudefroyite5 photos of Oyelite associated with Gaudefroyite on
Baryte4 photos of Oyelite associated with Baryte on
Hausmannite4 photos of Oyelite associated with Hausmannite on

Related Minerals - Nickel-Strunz GroupingHide

9.HA.10KenyaiteNa2Si22O41(OH)8 · 6H2OMon.
9.HA.25MagbasiteKBaFe3+Mg7Si8O22(OH)2F6Orth. mmm (2/m 2/m 2/m) : Cmma
9.HA.50RudenkoiteSr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2OMon.
9.HA.55FoshallasiteCa3[Si2O7] · 3H2O(?)
9.HA.60NagelschmidtiteCa7(SiO4)2(PO4)2Hex. 6 : P61
9.HA.65Caryochroite(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17Mon.
9.HA.70JuaniteCa10Mg4Al2Si11O39 · 4H2O or near
9.HA.75TacharaniteCa12Al2Si18O33 (OH)36Mon.
9.HA.90Tiettaite(Na,K)17FeTiSi16O29(OH)30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Cmcm

Related Minerals - Dana Grouping (8th Ed.)Hide[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Orth.[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Mon.èrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)Orth. · 2H2OOrth. · 18H2OTric. 1 : P1 (OH)36Mon.·7H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.5.3SearlesiteNa(H2BSi2O7)Mon. 2 : P21
17.5.5ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.10DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
17.5.11DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
17.5.12HowliteCa2B5SiO9(OH)5Mon. 2/m : P21/b
17.5.13BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
17.5.15KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
17.5.16HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
17.5.17SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
17.5.24Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
17.5.25Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
17.5.26Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
17.5.27DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.28 FerridraviteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
17.5.30Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
17.5.32TienshaniteKNa3Na6Ca2Ba6Mn6(Ti4+,Nb)6B12Si36O114(O,OH,F)11Hex. 6/m : P6/m
17.5.34TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.36NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.40Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)Tric. 1 : P1
17.5.44SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.45Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
17.5.46FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.47Axinite-(Fe)Ca2Fe2+Al2BSi4O15OHTric. 1 : P1
17.5.49Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
17.5.50Hyalotekite(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)Tric. 1 : P1
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2Mon.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for OyeliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kusachi, I., Henmi, C., Henmi, K. (1980) 10Å Tobermorite from Fuka, the Town of Bitchu, Okayama Prefecture. Journal of the Mineralogical Society of Japan: 14: 314-322. [in Japanese]
Kusachi, I., Henmi, C., Henmi, K. (1984) An oyelite-bearing vein at Fuka, the Town of Bitchu, Okayama Prefecture. Journal of the Japanese Association of Mining, Petroleum and Economic Geologists: 79: 267-275.
Dunn, P.J., Chao, G.Y., Fitzpatrick, J.J., Langley, R.H., Fleischer, M., Zilczer, J.A. (1986) New mineral names. American Mineralogist: 71: 230.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for OyeliteHide

Localities for OyeliteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Negev
Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
Japan (TL)
  • Honshu Island
    • Chugoku Region
      • Okayama Prefecture
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Fuka
Journal of the Mineralogical Society of Japan (1980): 14: 314-322.; Mineralogical Journal Vol. 14 (1989) , No. 7 pp 299-302; Henmi, C., & Kusachi, I. (1992). Clinotobermorite, Ca5Si6 (O, OH) 18· 5H2O, a new mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine, 56(3), 353-358.; KUSACHI, I., & HENMI, C. (1991). Sillenite from Fuka, Okayama prefecture, Japan. Mineralogical Journal, 15(8), 343-348.
    • Kinki region
      • Mie Prefecture
        • Ise City
Minakawa, T., Inaba, S., Noto, S. (1986) Oyelite from Suisho-dani, Ise, Mie Prefecture. Ganseki Koubutsu Koushou Gakkaishi, 81, 138-142)
South Africa
  • Northern Cape Province
    • Kalahari manganese field
      • Kuruman
        • N'Chwaning Mines
[Von Bezing, K. L. et al. (1991) - The Kalahari (Afrique du Sud) manganese field : an update, Mineralogical Record, 22 (3), 279-302.]
Minerals of South Africa
Van King
  • California
    • Riverside Co.
      • Crestmore
Kusachi, I., Henmi, C., Henmi, K. (1980) 10A tobermorite from Fuka, the Town of Bitchu, Okayama Prefecture. Koubutsugaku Zasshi (Journal of the Mineralogical Society of Japan) 14, 314-322 (in japanese)
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