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Rilandite

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Formula:
Cr4Al2SiO11 · 5H2O or near
Hardness:
2 - 3
Name:
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.HB.10

9 : SILICATES (Germanates)
H : Unclassified silicates
B : With Ti, V, Cr
7.11.14.1

7 : MULTIPLE OXIDES
11 : Miscellaneous
16.15.4

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

Physical Properties of RilanditeHide

Hardness:
2 - 3 on Mohs scale

Chemical Properties of RilanditeHide

Formula:
Cr4Al2SiO11 · 5H2O or near
IMA Formula:
Cr3+6SiO11 · 5H2O(?)
Common Impurities:
Fe,Mg,Ca

Type Occurrence of RilanditeHide

Other Language Names for RilanditeHide

German:Rilandit
Spanish:Rilandita

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
16.15.2Mukhinite{Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH)Mon.
16.15.3Chernykhite(Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2Mon.
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

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.
USA (TL)
 
  • Colorado
    • Rio Blanco Co.
      • Meeker
Minerals of Colorado (1997) Eckel, E. B.
Mineral and/or Locality  
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