Mineralogy Database

Kristiansenite Mineral Data

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General Kristiansenite Information

Help on Chemical  Formula: Chemical Formula: Ca2ScSn(Si2O7)(Si2O6OH)
Help on Composition: Composition: Molecular Weight = 291.23 gm
   Sodium      0.32 %  Na    0.43 % Na2O
   Calcium    13.21 %  Ca   18.49 % CaO
   Zirconium   0.31 %  Zr    0.42 % ZrO2
   Scandium    5.25 %  Sc    8.05 % Sc2O3
   Aluminum    0.19 %  Al    0.35 % Al2O3
   Iron        1.34 %  Fe    1.73 % FeO
   Silicon    19.09 %  Si   40.85 % SiO2
   Tin        21.60 %  Sn   27.43 % SnO2
   Hydrogen    0.23 %  H     2.04 % H2O
   Oxygen     38.46 %  O
             ______        ______ 
             100.00 %       99.78 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.96Na0.04Sn0.53Sc0.34Fe2+0.07Al0.02Zr0.01Si1.98O6.34(OH)0.66
Help on Environment: Environment: Late-stage hydrothermal mineral in a granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Heftejern, T�rdal, Telemark, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Roy Kristiansen (1943-), amateur mineralogist who first observed the mineral.
Help on Synonym: Synonym: IMA2000-051

Kristiansenite Image

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Comments: Two very nice, clear, intergrown crystals of kristiansenite in pinkish matrix.
Location: Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway. Scale: Crystal size 1 mm.
© Tom Loomis / Dakota Matrix

Kristiansenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1926:1:1.5864
Help on Cell Dimensions: Cell Dimensions: a = 10.028, b = 8.408, c = 13.339, Z = 8; alpha = 90.01°, beta = 109.1°, gamma = 90° V = 1,062.77 Den(Calc)= 3.64
Help on Crystal System: Crystal System: Triclinic - Pedial H-M Symbol (1) Space Group: C1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.146(1)(004), 3.089(0.63)(222), 5.18(0.53)(111),2.595(0.34)(222), 2.901(0.19)(221), 2.142(0.17)(331),

Physical Properties of Kristiansenite

Help on Color: Color: Colorless, White.
Help on Density: Density: 3.3
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Habit: Habit: Tapered - Crystals are noticably tapered from one end to the other.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Kristiansenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.142 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2033,KPDmeas= 0.2242,KC= 0.1963
Ncalc = 1.65 - 1.71
Help on Optical Data: Optical Data: Biaxial (?), b=1.74

Calculated Properties of Kristiansenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.50 gm/cc
note: Specific Gravity of Kristiansenite =3.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEKristiansenite = 65.85 barns/electron
U=PEKristiansenite x rElectron Density= 230.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kristiansenite is Not Radioactive

Kristiansenite Classification

Help on  Dana Class: Dana Class: (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.04)Cuspidine - Wohlerite group Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m Burpalite Na2CaZrSi2O7F2 P 21/a 2/m Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m Jennite Ca9Si6O18(OH)6•8H2O P1 1 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2•3.5(H2O) Unk Ortho Natrokomarovite* Na6CaNb6[Si4O12F2•4(H2O) C mmm 2/m 2/m 2/m Suolunite Ca2Si2O5(OH)2•(H2O) F dd2 mm2 Mongolite Ca4Nb6Si5O24(OH)10•5(H2O) Unk Tetra Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m
Help on  Strunz Class: Strunz Class: 09.BC.30 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BC -Si2O7 groups, without non-tetrahedral anions;
09.BC.30 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1

Other Kristiansenite Information

Help on References: References: NAME( AmMin, 88:251) PHYS. PROP.(AmMin, 88:251) OPTIC PROP.(AmMin, 88:251)
Help on See Also: See Also: Links to other databases for Kristiansenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.BC.30





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