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Cr4Al2SiO11 · 5H2O or near
2 - 3
Named after James L. Riland, newspaper publisher of Meeker, Colorado, USA.
This page provides mineralogical data about Rilandite.

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Classification of RilanditeHide

Approved, 'Grandfathered' (first described prior to 1959), Questionable

9 : SILICATES (Germanates)
H : Unclassified silicates
B : With Ti, V, Cr

11 : Miscellaneous

16 : Silicates Containing Aluminum and other Metals
15 : Aluminosilicates of V and Cr

Physical Properties of RilanditeHide

2 - 3 on Mohs scale

Chemical Properties of RilanditeHide

Cr4Al2SiO11 · 5H2O or near
IMA Formula:
Cr6SiO11 · 5H2O (?)
Common Impurities:

Type Occurrence of RilanditeHide

Other Language Names for RilanditeHide


Related Minerals - Nickel-Strunz GroupingHide

9.HB.05Ilmajokite(Na,Ce,Ba)2TiSi3O5(OH)10 · nH2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.15.1RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2Mon. 2/m : B2/b
16.15.5ShuiskiteCa2MgCr2(Si2O7)(SiO4)(OH)2 · 2H2OMon.
16.15.6VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2OMon.

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 RilanditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1933): 18: 195-215.

Internet Links for RilanditeHide

Localities for RilanditeHide

ⓘ - 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.
  • Colorado
    • Rio Blanco Co.
      • Meeker
Minerals of Colorado (1997) Eckel, E. B.
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