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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.

Classification of Rilandite

Questionable/Doubtful
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
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First Recorded Occurrence of Rilandite

Year of Discovery:
1933

Physical Properties of Rilandite

Hardness (Mohs):
2 - 3

Chemical Properties of Rilandite

Formula:
Cr4Al2SiO11 · 5H2O or near
Essential elements:
All elements listed in formula:
Common Impurities:
Fe,Mg,Ca

Relationship of Rilandite to other Species

9.HB.05Ilmajokite(Na,Ce,Ba)2TiSi3O5(OH)10 · nH2O
16.15.1RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
16.15.2Mukhinite{Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH)
16.15.3Chernykhite(Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2
16.15.5ShuiskiteCa2(Mg,Al)(Cr,Al)2(Si2O7)(SiO4)(OH)2 · 2H2O
16.15.6VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O

Other Names for Rilandite

Name in Other Languages:
German:Rilandit
Spanish:Rilandita

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.

References for Rilandite

Reference List:
American Mineralogist (1933): 18: 195-215.

Internet Links for Rilandite

Localities for Rilandite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA (FRL)
 
  • Colorado
    • Rio Blanco Co.
      • Meeker
Minerals of Colorado (1997) Eckel, E. B.
Mineral and/or Locality  
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