Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (14 online) Mindat Auctions

Hellandite-(Ce)

Big Photo

Tre Croci, Vetralla, Vico Lake, Viterbo Province, Latium, Italy
© 2008 Jesse Crawford

Formula:
(Ca,Ce)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
Colour:Light green


Hellandite Group.

Classification of Hellandite-(Ce)

IMA status:Approved 2001
Strunz 8th edition ID:8/F.36-09
Nickel-Strunz 10th (pending) edition ID:9.DK.20

9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains
mindat.org URL:http://www.mindat.org/min-27087.html
Please feel free to link to this page.

Type Occurrence of Hellandite-(Ce)

Type Locality:Campo Padella, Capranica, Vico Lake, Viterbo Province, Latium, Italy

Physical Properties of Hellandite-(Ce)

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Light green

Chemical Properties of Hellandite-(Ce)

Formula:
(Ca,Ce)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
All elements listed in formula:Al, B, Ca, Ce, Fe, H, O, Si

Relationship of Hellandite-(Ce) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DK.05Babingtonite
Ca
 
2
(Fe,Mn)FeSi
 
5
O
 
14
(OH)
9.DK.05Lithiomarsturite
LiCa
 
2
Mn
 
2
Si
 
5
O
 
14
(OH)
9.DK.05Manganbabingtonite
Ca
 
2
(Mn,Fe)FeSi
 
5
O
 
14
(OH)
9.DK.05Marsturite
NaCaMn
 
3
Si
 
5
O
 
14
(OH)
9.DK.05Nambulite
(Li,Na)Mn
 
4
Si
 
5
O
 
14
(OH)
9.DK.05Natronambulite
(Na,Li)(Mn,Ca)
 
4
Si
 
5
O
 
14
OH
9.DK.05Rhodonite
MnSiO
 
3
9.DK.05Scandiobabingtonite
Ca
 
2
(Fe
2+
 
,Mn)ScSi
 
5
O
 
14
(OH)
9.DK.05Fowlerite
9.DK.10Santaclaraite
CaMn
 
4
[Si
 
5
O
 
14
OH](OH)·H
 
2
O
9.DK.15Saneroite
Na
 
2
(Mn,Mn)
 
10
Si
 
11
VO
 
34
(OH)
 
4
9.DK.20Hellandite-(Y)
(Ca,Y)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
9.DK.20Tadzhikite-(Ce)
(Ca,Ce)
 
4
(Ca,Y)
 
2
(Ti
4+
 
,Fe
3+
 
,Al)[B
 
4
Si
 
4
O
 
22
(O,OH)
 
6
](OH)
 
2
9.DK.20Mottanaite-(Ce)
Ca
 
4
(CeCa)AlBe
 
2
(Si
 
4
B
 
4
O
 
22
)O
 
2
9.DK.20Ciprianiite
Ca
 
4
[(Th,U)(REE)]Al[]
 
2
(Si
 
4
B
 
4
O
 
22
)(OH,F)
 
2

Other Names for Hellandite-(Ce)

Synonyms:
IMA2001-019
Other Languages:
Russian:Гелландит-(Ce)

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 Hellandite-(Ce)

Reference List:Oberti, R., Ottolini, L., Cámara, F., and Della Ventura, G. (1999) Crystal structure refinement of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals. American Mineralogist: 84: 913-921.

Oberti, R., G. Della Ventura, L. Ottolini, F. C. Hawthorne, P. Bonazzi (2002): Re-definition, nomenclature and crystal chemistry of the hellandite group. American Mineralogist 87, 745-752.
www.geo.vu.nl/~ima-cnmmn/hellandite.pdf

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Hellandite-(Ce)

Search Engines:
  • Look for Hellandite-(Ce) on Google
  • Look for Hellandite-(Ce) images on Google
    • External Links:
  • Look for Hellandite-(Ce) on Webmineral
  • Look for Hellandite-(Ce) on Athena Mineralogy
  • Look for Hellandite-(Ce) on Wikipedia
  • Look for Hellandite-(Ce) on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Hellandite-(Ce) in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Fabre Minerals - search for Hellandite-(Ce) specimens
  • Wendel Minerals - Auktion & Shop
  • rare and unusual minerals mainly crystallized
  • Search for - Hellandite-(Ce) - on e-Rocks Mineral Sales & Auctions
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy Fine Minerals from mineralsweb.com
  • Top quality minerals from Kristalle of California
  • The Arkenstone - Fine Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Buy from David K Joyce minerals
  • SpiriferMinerals.com - high quality specimens
  • Search for Hellandite-(Ce) at Thames Valley Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Hellandite-(Ce)

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    These maps work faster with Firefox!
    (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.
    Italy
     
    • Latium
      • Viterbo Province
        • Vico Lake
          • Capranica
    		Lapis 11(1999), 27; Am. Mineral. 84 (1999), 913-921; Am. Mineral. 87 (2002), 745-752
          • Vetralla
    		American Mineralogist, Volume 91, pages 1170–-1177, 2006
    Carlini, R., Signoretti, E., 2003. Località minori del vulcano Vicano: Villa S.Giovanni in Tuscia e Mazzocchio. Il Cercapietre. Not. del Gruppo Mineralogico Romano, 1-2: 33-41
    USA
     
    • Idaho
      • Boise Co.
    		The Canadian Mineralogist, V 42, 2004, pp. 121-124.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 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.