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Rilandite

Formula:
Cr
 
4
Al
 
2
SiO
 
11
·5H
 
2
O 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

IMA status:Questionable/Doubtful
Strunz 8th edition ID:8/H.22-10
Nickel-Strunz 10th (pending) edition ID:9.HB.10

9 : SILICATES (Germanates)
H : Unclassified silicates
B : With Ti, V, Cr
Dana 8th edition ID:7.11.14.1

7 : MULTIPLE OXIDES
11 : Miscellaneous
Hey's CIM Ref.:16.15.4

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

Type Locality:Riland uranium claim, Meeker, Rio Blanco Co., Colorado, USA
Year of Discovery:1933

Physical Properties of Rilandite

Hardness (Mohs):2 - 3

Chemical Properties of Rilandite

Formula:
Cr
 
4
Al
 
2
SiO
 
11
·5H
 
2
O or near
Essential elements:Al, Cr, H, O, Si
All elements listed in formula:Al, Cr, H, O, Si
Common Impurities:Fe,Mg,Ca

Relationship of Rilandite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.HB.05Ilmajokite
(Na,Ce,Ba)
 
2
TiSi
 
3
O
 
5
(OH)
 
10
·nH
 
2
O
Related Minerals - Hey's Index Grouping:

- +
16.15.1Roscoelite
K(V,Al)
 
2
[(OH)
 
2
|AlSi
 
3
O
 
10
]
16.15.2Mukhinite
{Ca
 
2
}{Al
 
2
V
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
16.15.3Chernykhite
(Ba,Na)(V
3+
 
,Al,Mg)
 
2
[(OH)
 
2
|(Si,Al)
 
4
O
 
10
]
16.15.5Shuiskite
Ca
 
2
(Mg,Al)(Cr,Al)
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · 2H
 
2
O
16.15.6Volkonskoite
Ca
 
0.3
(Cr,Mg,Fe)
 
2
(Si,Al)
 
4
O
 
10
(OH)
 
2
·4H
 
2
O

Other Names for Rilandite

Other Languages:
German:Rilandit
Spanish:Rilandita

Other Information

Health Warning: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

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    Localities for Rilandite

    (TL) indicates type locality. ? 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
     
    • Colorado
      • Rio Blanco Co.
        • Meeker
    		Minerals of Colorado (1997) Eckel, E. B.
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 9th Nov 2009 10:55:14