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Rilandite

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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
3+
 
,Al)
 
2
(AlSi
 
3
O
 
10
)(OH)
 
2
16.15.2Mukhinite
{Ca
 
2
}{Al
 
2
V
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
16.15.3Chernykhite
(Ba,Na)(V
3+
 
,Al,Mg)
 
2
((Si,Al)
 
4
O
 
10
)(OH)
 
2
16.15.5Shuiskite
Ca
 
2
(Mg,Al)(Cr,Al)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
 · 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

    Hide Locality List
    (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
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