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Kristiansenite

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Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
© Knut Eldjarn

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Formula:
Ca
 
2
ScSn(Si
 
2
O
 
7
)(Si
 
2
O
 
6
OH)
System:TriclinicColour:Colorless, white, or ...
Hardness:5½ - 6
Name:
Named after Roy Kristiansen (b.1943) who first observed the new mineral.
This page provides mineralogical data about Kristiansenite.

Classification of Kristiansenite

IMA status:Approved 2000
Strunz 9th edition ID:9.BC.30
Nickel-Strunz 10th (pending) edition ID:9.BC.30

9 : SILICATES (Germanates)
B : Sorosilicates
C : Si2O7 groups, without non-tetrahedral anions; cations in octahedral [6] and greater coordination
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Type Occurrence of Kristiansenite

Type Locality:Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
Place of Conservation of Type Material:Geological Museum, University of Oslo, Norway
Year of Discovery:1998
Geological Setting of type material:Late stage hydrothermal vugs in an amazonite pegmatite
Associated Minerals at type locality:
StilpnomelaneScandiobabingtoniteQuartzMilariteIxiolite
Hingganite-(Y)EpidoteBazziteApatiteAlbite

Physical Properties of Kristiansenite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colorless, white, or slightly yellowish
Streak:white
Hardness (Mohs):5½ - 6
Tenacity:Brittle
Fracture:Irregular/Uneven
Density (calculated):3.64 g/cm3

Crystallography of Kristiansenite

Crystal System:Triclinic
Class (H-M):1 - Pedial
Cell Parameters:a = 10.007(5) Å, b = 8.401(5) Å, c = 13.327(5) Å
α = 90.08°, β = 109.06°, γ = 90.01°
Ratio:a:b:c = 1.191 : 1 : 1.586
Unit Cell Volume:V 1,058.96 ų (Calculated from Unit Cell)
Z:4
Morphology:Tapered crystals, to 2 mm, and as aggregates to 2 mm across. Sometimes as colorless grains in spessartine
Twinning:polysynthetic twinning on {010}
Comment:space group C1

Chemical Properties of Kristiansenite

Formula:
Ca
 
2
ScSn(Si
 
2
O
 
7
)(Si
 
2
O
 
6
OH)
Essential elements:Ca, H, O, Sc, Si, Sn
All elements listed in formula:Ca, H, O, Sc, Si, Sn

Relationship of Kristiansenite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BC.05Gittinsite
CaZrSi
 
2
O
 
7
9.BC.05Keiviite-(Y)
(Y,Yb)
 
2
[Si
 
2
O
 
7
]
9.BC.05Keiviite-(Yb)
(Yb,Y)
 
2
Si
 
2
O
 
7
9.BC.05Thortveitite
(Sc,Y)
 
2
Si
 
2
O
 
7
9.BC.05Yttrialite-(Y)
(Y,Th)
 
2
Si
 
2
O
 
7
9.BC.10Keldyshite
(Na,H)
 
2
ZrSi
 
2
O
 
7
9.BC.10Khibinskite
K
 
2
ZrSi
 
2
O
 
7
9.BC.10Parakeldyshite
Na
 
2
ZrSi
 
2
O
 
7
9.BC.15Rankinite
Ca
 
3
Si
 
2
O
 
7
9.BC.20Barysilite
Pb
 
8
Mn
2+
 
[Si
 
2
O
 
7
]
 
3
9.BC.25Edgarbaileyite
(Hg-Hg)
 
3
Si
 
2
O
 
7
9.BC.35Percleveite-(Ce)
(Ce,La,Nd)
 
2
Si
 
2
O
 
7

Other Names for Kristiansenite

Synonyms:
IMA2000-051
Other Languages:
German:Kristiansenit
Spanish:Kristiansenita

Other Information

Fluorescence in UV light:Nonfluorescent
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 Kristiansenite

Reference List:

- +
- Ferraris, G., Gula, A., Ivaldi, G., Nespolo, M. & Raade, G. (2001): Crystal structure of kristiansenite: a case of class IIB twinning by metric merohedry. Zeitschrift für Kristallographie. 216, 442-448.

- Raade, G., Ferraris, G., Gula, A., Ivaldi, G. & Bernhard, F. (2002): Kristiansenite, a new calcium-scandium-tin sorosilicate from granite pegmatite in Tørdal, Telemark, Norway. Mineralogy and Petrology. 75(1/2), 89-99.

- Menor Salván, C. & Prado Herrero, P. (2009): First find of Kristiansenite in Spain: Comparison with the type specimen by non-descriptive techniques. Estudos Geológicos, 19(2), 135-139.

Internet Links for Kristiansenite

Search Engines:
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    • External Links:
  • Look for Kristiansenite on Webmineral
  • Look for Kristiansenite on Athena Mineralogy[Link Broken?]
  • Look for Kristiansenite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • SpiriferMinerals.com - high quality low prices
  • Fabre Minerals - search for Kristiansenite specimens
  • Buy fine minerals and gemstones from Pala International
  • The Arkenstone - Fine Minerals
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  • Find Kristiansenite on www.crystalclassics.co.uk
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
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    • Localities for Kristiansenite

    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.
    Italy
     
    • Piedmont
      • Verbano-Cusio-Ossola Province
        • Baveno
          • Oltrefiume
            • Mount Camoscio
    		Sergio Varvello personal communication (2004) - Marco E. Ciriotti; Guastoni A., Pezzotta F., 2004. Kristiansenite a Baveno, secondo ritrovamento mondiale della specie. Riv. Mineral. Ital., 28, 4: 247-251
    Norway
     
    • Telemark
      • Drangedal
        • Tørdal
    		Ferraris, G., Gula, A., Ivaldi, G., Nespolo, M. & Raade, G. (2001): Crystal structure of kristiansenite: a case of class IIB twinning by metric merohedry. Zeitschrift für Kristallographie. 216, 442-448. ; Raade, G., Ferraris, G., Gula, A., Ivaldi, G. & Bernhard, F. (2002): Kristiansenite, a new calcium-scandium-tin sorosilicate from granite pegmatite in Tørdal, Telemark, Norway. Mineralogy and Petrology. 75(1/2), 89-99.
    Spain
     
    • Madrid
    		Prado-Herrero, P. et al. (2009): First find of Kristiansenite in Spain: Comparison with the type specimen by non-descreptive techniques. Estudos Geológicos 19 (2): 135-139
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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. 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.
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