Mindat Logo

Rollandite

This page is currently not sponsored. Click here to sponsor this page.



Formula:
Cu
 
3
(AsO
 
4
)
 
2
· 4H
 
2
O
System:OrthorhombicColour:Glass-green
Lustre:VitreousHardness:4 - 4½
This page provides mineralogical data about Rollandite.

Classification of Rollandite

IMA status:Approved 1998
Strunz 8th edition ID:7/C.0-37
Nickel-Strunz 10th (pending) edition ID:8.CD.30

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
mindat.org URL:http://www.mindat.org/min-7037.html
Please feel free to link to this page.

Type Occurrence of Rollandite

Type Locality:Roua Mines (Clue de Roua), Daluis, Guillaumes, Alpes-Maritimes, Provence-Alpes-Côte d'Azur, France

Physical Properties of Rollandite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Glass-green
Streak:Very light green
Hardness (Mohs):4 - 4½

Crystallography of Rollandite

Crystal System:Orthorhombic

Optical Data of Rollandite

Type:Biaxial (-)
RI values: nα = 1.745 nβ = 1.755 nγ = 1.760
2V:Measured: 71° , Calculated: 70°
Maximum Birefringence:δ = 0.015

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:strong

Chemical Properties of Rollandite

Formula:
Cu
 
3
(AsO
 
4
)
 
2
· 4H
 
2
O
Simplified for copy/paste:Cu3(AsO4)2·4H2O
Essential elements:As, Cu, H, O
All elements listed in formula:As, Cu, H, O

Relationship of Rollandite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CD.05Kolbeckite
ScPO
 
4
· 2H
 
2
O
8.CD.05Metavariscite
AlPO
 
4
· 2H
 
2
O
8.CD.05Phosphosiderite
FePO
 
4
· 2H
 
2
O
8.CD.05UM2005-02-AsO:AlHPScSi
ScAsO
 
4
· 2H
 
2
O
8.CD.10Mansfieldite
AlAsO
 
4
· 2H
 
2
O
8.CD.10Scorodite
FeAsO
 
4
· 2H
 
2
O
8.CD.10Strengite
FePO
 
4
· 2H
 
2
O
8.CD.10Variscite
AlPO
 
4
· 2H
 
2
O
8.CD.10Yanomamite
InAsO
 
4
· 2H
 
2
O
8.CD.15Parascorodite
FeAsO
 
4
· 2H
 
2
O
8.CD.20Ludlamite
(Fe,Mn,Mg)
 
3
(PO
 
4
)
 
2
· 4H
 
2
O
8.CD.25Sterlinghillite
Mn
 
3
(AsO
 
4
)
 
2
· 4H
 
2
O

Other Names for Rollandite

Synonyms:
IMA1998-001
Other Languages:
German:Rollandit
Russian:Ролландит
Spanish:Rollandita

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 Rollandite

Reference List:

- +
Sarp, H. & Černý, R. (2000): Rollandite, Cu3(AsO4)2.4H2O, a new mineral: its description and crystal structure. European Journal of Mineralogy, 12, 1045-1050.

Internet Links for Rollandite

Search Engines:
  • Look for Rollandite on Google
  • Look for Rollandite images on Google
  • External Links:
  • Look for Rollandite on Webmineral
  • Look for Rollandite on Athena Mineralogy
  • Look for Rollandite on Wikipedia
  • Look for Rollandite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Rollandite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • The Arkenstone - Fine Minerals
  • Lapis Mineral Magazin
  • Rare and Unusual minerals at Mineralogical Research Company
  • Fine minerals from bisbeeborn.com
  • Fine and rare minerals from mintreasure.com
  • SpiriferMinerals.com - high quality low prices
  • Buy from Dave Bunk Minerals
  • rare and unusual minerals mainly crystallized
  • High-end worldwide specimens & outstanding customer service
  • Buy minerals from YourMineralCollection
  • Search for Rollandite on Well-Arranged Molecules
  • Localities for Rollandite

    (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.
    France
     
    • Provence-Alpes-Côte d'Azur
      • Alpes-Maritimes
        • Guillaumes
          • Daluis
    Sarp, H. and Černý, R. (2000): Rollandite, Cu3(AsO4)2.4H2O, a new mineral: its description and crystal structure. Eur. J. Mineral., 12, 1045-1050. MR 33 (2002), 169
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: October 16, 2014 10:08:47
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds