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About OrientiteHide

Seal of Oriente Province, Cuba
Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O
Light reddish brown, chocolate-brown
Resinous, Sub-Metallic
4 - 5
Specific Gravity:
3.05 - 3.33
Crystal System:
Named in 1921 by Donnel Foster Hewett and Earl Vincent Shannon for the type locality, the Oriente Province in Cuba. In 1976, Oriente Province was split up into 6 provinces. The type locality is now located in Santiago de Cuba Province.
This page provides mineralogical data about Orientite.

Classification of OrientiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
3 : Insular, Mixed, Single, and Larger Tetrahedral Groups with insular single and triple groups (n=1, 3)

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe

Physical Properties of OrientiteHide

Resinous, Sub-Metallic
Transparent, Translucent
Light reddish brown, chocolate-brown
4 - 5 on Mohs scale
3.05 - 3.33 g/cm3 (Measured)    3.48 g/cm3 (Calculated)

Optical Data of OrientiteHide

Biaxial (+)
RI values:
nα = 1.758 nβ = 1.776 nγ = 1.795
Measured: 68° to 83°, Calculated: 90°
Max Birefringence:
δ = 0.037
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
relatively strong

Chemical Properties of OrientiteHide

Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O
IMA Formula:
Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O
Common Impurities:

Crystallography of OrientiteHide

Crystal System:
Cell Parameters:
a = 6.08 Å, b = 9.04 Å, c = 19.14 Å
a:b:c = 0.673 : 1 : 2.117
Unit Cell V:
1,052.00 ų (Calculated from Unit Cell)

Type Occurrence of OrientiteHide

Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 93819.
The Natural History Museum, London, England, 1923,1029.
Hewett, D.F. and E.V. Shannon (1921) Orientite, a new hydrous silicate of manganese and calcium from Cuba. American Journal of Science: 1: 491-506.

Other Language Names for OrientiteHide

Simplified Chinese:锰柱石

Common AssociatesHide

Associated Minerals Based on Photo Data:
6 photos of Orientite associated with MacfalliteCa2Mn3+3(SiO4)(Si2O7)(OH)3
2 photos of Orientite associated with BrauniteMn2+Mn3+6(SiO4)O8
1 photo of Orientite associated with GroutiteMn3+O(OH)
1 photo of Orientite associated with Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
1 photo of Orientite associated with QuartzSiO2
1 photo of Orientite associated with PectoliteNaCa2Si3O8(OH)
1 photo of Orientite associated with CalciteCaCO3
1 photo of Orientite associated with TangeiteCaCu(VO4)(OH)

Related Minerals - Nickel-Strunz GroupingHide

9.BJ.ArsenmedaiteMn2+6 As5+Si5O18(OH)Mon.
9.BJ.15TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
9.BJ.25TiragalloiteMn2+4As5+Si3O12(OH)Mon. 2/m
9.BJ.35RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2·2H2OMon. 2
9.BJ.40Ardennite-(As)Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m)
9.BJ.40Ardennite-(V)Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m) : Pmmn
9.BJ.50KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
9.BJ.55ZunyiteAl13Si5O20(OH,F)18ClIso. 4 3m : F4 3m
9.BJ.60HubeiteCa2Mn2+Fe3+[HSi4O13] · 2H2OTric.
9.BJ.65Cassagnaite(Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8Orth. mmm (2/m 2/m 2/m) : Cmcm

Related Minerals - Dana Grouping (8th Ed.)Hide mmm (2/m 2/m 2/m)

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.18.3ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
14.18.4NorrishiteKLiMn3+2(Si4O10)O2Mon. 2/m : B2/m
14.18.5ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig.
14.18.6AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
14.18.8KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
14.18.13BustamiteCaMn2+(Si2O6)Tric. 1 : P1
14.18.14GlaucochroiteCaMn2+SiO4Orth. mmm (2/m 2/m 2/m)
14.18.15Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
14.18.16SantaclaraiteCaMn4[Si5O14OH](OH) · H2OTric.
14.18.18JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
14.18.19NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
14.18.20OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
14.18.21InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2OTric. 1 : P1
14.18.23RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2·2H2OMon. 2
14.18.24BostwickiteCaMn6Si3O16 · 7H2OOrth.
14.18.25KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
14.18.27SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
14.18.29MarsturiteNaCaMn3Si5O14(OH)Tric. 1 : P1
14.18.30RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 2 2 2 : C2 2 2
14.18.31Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
14.18.32Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2OOrth. mm2 : Ama2
14.18.35PyroxmangiteMnSiO3Tric. 1
14.18.37Neotocite(Mn,Fe,Mg)SiO3 · H2OAmor.
14.18.38BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)Tric. 1 : P1

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 OrientiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hewett, D.F. and E.V. Shannon (1921) Orientite, a new hydrous silicate of manganese and calcium from Cuba. American Journal of Science: 1: 491-506.
Sclar, C.B. (1961) Optical crystallography of orientite from Oriente Province, Cuba. American Mineralogist: 46: 226-232.
Moore, P.B., Ito, J., and Steele, I.M. (1979) Macfallite and orientite: calcium manganese (III) silicates from upper Michigan. Mineralogical Magazine: 43: 325-331.
Moore, P.B., J. Shen, and T. Araki (1985) Crystal chemistry of the 2∞[M 3+ 2ф2(TO4)2] sheet: structural principles and crystal structures of ruizite, macfallite and orientite. American Mineralogist (1985): 70: 171-181.
Mellini M., Merlino S., Pasero M. (1986) X-ray and HRTEM structure analysis of orientite. American Mineralogist: 71: 176-187.
Neues Jahrbuch für Mineralogie, Monatshefte (1989): 455.

Internet Links for OrientiteHide

Localities for OrientiteHide

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.
  • Fujian
    • Longyan
      • Liancheng Co.
        • Liancheng Mn deposit
Nanlai Zheng, Xingli Mao, and Jiansheng Ding (1986): Geology and Prospecting 22(3), 17-20
Cuba (TL)
  • Santiago de Cuba Province
AM 70 (1985), 171; HB2/2 (1995)
      • Bueycito
Van King
  • Liguria
    • La Spezia Province
      • Borghetto di Vara
Palenzona A. (1990) Orientite e MacFallite di Cerchiara (La Spezia). Rivista Mineralogica Italiana: 2: 111-114.; Jambor, J.L. and Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 197-200.
  • Hokkaidō Prefecture
    • Okhotsk Subprefecture (Abashiri Province)
      • Tokoro District
Miyajima, N., Osawa, S., Miura, H., Kikuchi, T. and Hiriya, Yu (1994) Proceedings of the 9th Quadrennial International Association on the Genesis of Ore Deposits (IAGOD) Symposium (Beijing), 603-616.
  • Central Serbia
    • Zaječar District
      • Bor area
Pačevski, A., Cvetković, V., Šarić, K.,Banješević, M., Hoefer, H.E., Kremenović, A. (2016): Manganese mineralization in andesites of Brestovačka Banja, Serbia: evidence of sea-floor exhalations in the Timok Magmatic Complex. Mineralogy and Petrology: 110: 491-502; http://forum.amiminerals.it/viewtopic.php?f=5&t=12922&sid=9b89d03bd5ce87f39ba8564967753056 (2016)
South Africa
  • Northern Cape
    • Kalahari manganese field
      • Hotazel
Minerals of South Africa
  • Michigan
    • Keweenaw Co.
      • Copper Harbor
Rocks & min.: 58:111.
  • New York
    • Lewis Co.
      • Diana Township
Michael Hawkins, New York State Museum
Mineral and/or Locality  
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