Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (6 online) Mindat Auctions

Chiavennite

Big Photo

Utö Island, Haninge, Södermanland, Sweden
© Bertil Otter

Show Chiavennite Photos (23)
Formula:
CaMnBe
 
2
Si
 
5
O
 
13
(OH)
 
2
·2H
 
2
O
System:OrthorhombicHardness:3
This page provides mineralogical data about Chiavennite.

Classification of Chiavennite

IMA status:Approved
Strunz 8th edition ID:8/G.07-20
Nickel-Strunz 10th (pending) edition ID:9.GF.25

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
F : Other Rare Zeolites
Dana 8th edition ID:70.5.1.1

70 : INOSILICATES Column or Tube Structures
5 : Column or Tube Structures with chains linked by Be
Hey's CIM Ref.:14.3.18

14 : Silicates not Containing Aluminum
3 : Silicates of Be
mindat.org URL:http://www.mindat.org/min-1002.html
Please feel free to link to this page.

Type Occurrence of Chiavennite

Type Locality:Tanno, Val San Giacomo, Chiavenna, Sondrio Province, Lombardy, Italy
Year of Discovery:1983

Physical Properties of Chiavennite

Hardness (Mohs):3

Crystallography of Chiavennite

Crystal System:Orthorhombic
Cell Parameters:a = 8.72Å, b = 31.32Å, c = 4.9Å
Ratio:a:b:c = 0.278 : 1 : 0.156
Unit Cell Volume:V 1,338.24 ų (Calculated from Unit Cell)

Optical Data of Chiavennite

Type:Biaxial (+)
RI values: nα = 1.596 nβ = 1.600 nγ = 1.618
2V:Measured: 50° , Calculated: 52°
Maximum Birefringence:δ = 0.022

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v weak

Chemical Properties of Chiavennite

Formula:
CaMnBe
 
2
Si
 
5
O
 
13
(OH)
 
2
·2H
 
2
O
Essential elements:Be, Ca, H, Mn, O, Si
All elements listed in formula:Be, Ca, H, Mn, O, Si
Common Impurities:Al,Fe,Mg,Ca,Na,K,F,C

Relationship of Chiavennite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.GF.05Terranovaite
(Na,Ca)
 
8
(Si
 
68
Al
 
12
)O
 
160
·29H
 
2
O
9.GF.10Gottardiite
Na
 
3
Mg
 
3
Ca
 
5
Al
 
19
Si
 
117
O
 
272
·93H
 
2
O
9.GF.15Lovdarite
(Na,K,Ca)
 
4
(Be,Al)
 
2
Si
 
6
O
 
16
·4H
 
2
O
9.GF.20Gaultite
Na
 
4
Zn
 
2
Si
 
7
O
 
18
·5H
 
2
O
9.GF.30Tschernichite
(Ca,Na
 
2
)[Al
 
2
Si
 
4
O
 
12
] · 4-8H
 
2
O
9.GF.35Mutinaite
Na
 
3
Ca
 
4
Si
 
85
Al
 
11
O
 
192
·60H
 
2
O
9.GF.40Tschörtnerite
Ca
 
4
(Ca,Sr,K,Ba)
 
3
Cu
 
3
[(OH)
 
2
|Al
 
3
Si
 
3
O
 
12
]
 
4
 · nH
 
2
O
9.GF.50Thornasite
(Na,K)Th,Si
 
11
(O,OH,F,Cl)
 
25
·8H
 
2
O
9.GF.55Direnzoite
NaK
 
6
MgCa
 
2
(Al
 
13
Si
 
47
O
 
120
)·36H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.3.1Phenakite
Be
 
2
[SiO
 
4
]
14.3.2Bertrandite
Be
 
4
[(OH)
 
2
|Si
 
2
O
 
7
]
14.3.3Beryllite
Be
 
3
[(OH)
 
2
|SiO
 
4
] · H
 
2
O
14.3.4Liberite
Li
 
2
Be[SiO
 
4
]
14.3.5Chkalovite
Na
 
2
BeSi
 
2
O
 
6
14.3.6Eudidymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
14.3.7Epididymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
14.3.8Gugiaite
Ca
 
2
Be[Si
 
2
O
 
7
]
14.3.9Jeffreyite
(Ca,Na)
 
2
(Be,Al)[Si
 
2
O
 
6
(O,OH)]
14.3.10Semenovite-(Ce)
(Na,Ca)
 
9
Fe
2+
 
(Ce,La)
 
2
[(Si,Be)
 
5
(O,OH,F)
 
12
]
 
4
14.3.11Barylite
BaBe
 
2
[Si
 
2
O
 
7
]
14.3.12Hingganite-(Ce)
Ce
 
2
□Be
 
2
Si
 
2
O
 
8
(OH)
 
2
14.3.13Hingganite-(Yb)
(Yb,Y)Be[OH|SiO
 
4
]
14.3.14Hingganite-(Y)
(Y,Yb,Er)Be[OH|SiO
 
4
]
14.3.15Minasgeraisite-(Y)
Y
 
2
CaBe
 
2
[O|SiO
 
4
]
 
2
14.3.16Sørensenite
Na
 
4
SnBe
 
2
Si
 
6
O
 
16
(OH)
 
4
14.3.17Trimerite
CaMn
2+
2
Be
 
3
[SiO
 
4
]
 
3
14.3.19Tvedalite
(Ca,Mn)
 
4
Be
 
3
Si
 
6
O
 
17
(OH)
 
4
·3H
 
2
O
14.3.20Harstigite
Ca
 
6
(Mn,Mg)Be
 
4
Si
 
6
(O,OH)
 
24
14.3.21Sverigeite
NaMnMgSnBe
 
2
Si
 
3
O
 
12
(OH)
14.3.22Joesmithite
[(Ca,Pb)][(Ca,Pb)
 
2
][(Mg,Fe
2+
 
)
 
5
][(OH)
 
2
|BeSi
 
7
O
 
22
]
14.3.23Gadolinite-(Y)
Y
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
14.3.24Gadolinite-(Ce)
(Ce,La,Nd,Y)
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
14.3.25Calciogadolinite
(Y,Ca)
 
2
(Fe,Fe)Be
 
2
Si
 
2
(O,OH)
 
10

Other Names for Chiavennite

Synonyms:
IMA1981-038
Other Languages:
German:Chiavennit
Russian:Кьявеннит
Spanish:Chiavennita

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 Chiavennite

Reference List:Raade, G., Åmli, R., Mladeck, M. H., Din, V. K., Larsen A. O. & Åsheim, A. (1983): Chiavennite from syenite pegmatites in the Oslo Region, Norway. American Mineralalogist: 68, 628-633.

European Journal of Mineralogy: 7: 1339-1344.

Pezzotta, F., Guastoni, A., Forner, H., Demartin, F., Kristiansen, R. (2005): Découverte exceptionnelle de chiavennite associée à pezzottaite dans la pegmatite de Sakavalana, Mandrosonoro, Madagascar. Le Règne Minéral, 61, ???-???.

Articles/Blogs about Chiavennite

Internet Links for Chiavennite

Search Engines:
  • Look for Chiavennite on Google
  • Look for Chiavennite images on Google
    • External Links:
  • Look for Chiavennite on Webmineral
  • Look for Chiavennite on Athena Mineralogy
  • Look for Chiavennite on Wikipedia
  • Look for Chiavennite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Chiavennite in the Natural History Museum (London) online catalogue
  • Chiavennite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Buy Fine Minerals from mineralsweb.com
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Search for - Chiavennite - on e-Rocks Mineral Sales & Auctions
  • Buy minerals from Mineralium.com
  • Search for Chiavennite at Thames Valley Minerals
  • Buy fine minerals and gemstones from Pala International
  • The Arkenstone - Fine Minerals
  • Top quality minerals from Kristalle of California
  • Fabre Minerals - search for Chiavennite specimens
  • Rare and Unusual minerals at Mineralogical Research Company
  • High-end worldwide specimens & outstanding customer service
  • Buy Minerals and Crystals from Crystalarium.com
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Chiavennite

    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
     
    • Lombardy
      • Sondrio Province
        • Chiavenna
          • Val San Giacomo
    		Amer.Min.(1983) 68, 623-627
    Madagascar
     
    • Fianarantsoa Province
      • Amoron'i Mania Region
        • Ampandramaika-Malakialina Pegmatite Field
          • Ambatofinandrahana Departement
            • Mandrosonoro area
              • Ambatovita
    		http://www.webmineralshop.com/articoli/sm2004_comment.htm
    Norway
     
    • Telemark
      • Porsgrunn
        • Langangen
          • Kokkersvold - Blåfjell
    		Am Min 68:5-6 pp 628-633
          • Rønningen
    		Burvald, Ingulv (1993): To forekomster av nefelin-syenitt-pegmatitt i Telemark. STEIN 20 (3), 176-179
        • Mørje
          • Sagåsen (Strandåsen)
    		Engvoldsen,T.,Andersen, F.,Berge, S.A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1),15-71
    A. O. Larsen, A. Åsheim and R. A. Gault, 2005.
    • Vestfold
      • Larvik
        • Brunlanes
    		Raade, G.; Åmli, R.; Mladeck, M.H.; Din, V.K.; Larsen, A.O. & Åsheim, A.(1983): Chiavennite from syenite pegmatites in the Oslo Region, Norway. American Mineralogist 68; 628-633
        • Hedrum
          • Lågendalen
    		Andersen, F. (1993): Hedrum pukkverk i Lågendalen. STEIN 20 (4), 236-238
        • Langesundsfjorden
    		Kristiansen, R. (1999): Berylliummineraler i Norge. STEIN 26 (2),8-23
    No reference listed
    Engvoldsen,T.,Andersen, F.,Berge, S.A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1),15-71
    Engvoldsen,T.,Andersen, F.,Berge, S.A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1),15-71/ Raade, G.; Åmli, R.; Mladeck, M.H.; Din, V.K.; Larsen, A.O. & Åsheim, A.(1983): Chiavennite from syenite pegmatites in the Oslo Region, Norway. American Mineralogist 68; 628-633
    Engvoldsen,T.,Andersen, F.,Berge, S.A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1),15-71
    Collection of Peter Andresen.
    Collection of OT Ljøstad.
    Am.Min.: 77:438-443.
    Sweden
     
    • Södermanland
      • Haninge
    		Langhof, J., Holtstam, D. & Gustafsson, L., 2000: Chiavennite and zoned genthelvite-helvite as late-stage minerals of the Proterozoic LCT pegmatites at Utö, Stockholm, Sweden. GFF, Vol. 122 (Pt. 2, June), pp. 207-212. Stockholm. ISSN 1103-5897
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. 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.