Kristiansenite Mineral Data

General Kristiansenite Information

Chemical Formula:

Ca2ScSn(Si2O7)(Si2O6OH)

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

Empirical Formula:

Ca_0.96Na_0.04Sn_0.53Sc_0.34Fe²⁺_0.07Al_0.02Zr_0.01Si_1.98O_6.34(OH)_0.66

Environment:

Late-stage hydrothermal mineral in a granite pegmatite.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Heftejern, Tørdal, Telemark, Norway. Link to MinDat.org Location Data.

Name Origin:

Named for Roy Kristiansen (1943-), amateur mineralogist who first observed the mineral.

Synonym:

IMA2000-051

Kristiansenite Image

Images:

Kristiansenite

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

Kristiansenite Crystallography

Axial Ratios:

a:b:c =1.1926:1:1.5864

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

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: C1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Ferraris G , Gula A , Ivaldi G , Nespolo M , Raade G , Zeitschrift fur Kristallographie , 216 (2001) p.442-448, Crystal structure of kristiansenite: a case of class IIB twinning by metric merohedry, Locality: amazonite pegmatite, Heftetjern, Tordal, Telemark, Norway

Physical Properties of Kristiansenite

Color:

Colorless, White.

Density:

3.3

Diaphaneity:

Translucent to transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Habit:

Tabular - Form dimensions are thin in one direction.

Habit:

Tapered - Crystals are noticably tapered from one end to the other.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kristiansenite

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

Optical Data:

Biaxial (?), b=1.74

Calculated Properties of Kristiansenite

Electron Density:

Bulk Density (Electron Density)=3.50 gm/cc
note: Specific Gravity of Kristiansenite =3.64 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Kristiansenite}= 65.85 barns/electron
U=PE_{Kristiansenite} x rElectron Density= 230.67 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kristiansenite is Not Radioactive

Kristiansenite Classification

Dana Class:

56.02.04.16 (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

56.02.04.01 Baghdadite Ca3(Zr,Ti)Si2O9 P 2₁/a 2/m

56.02.04.02 Burpalite Na2CaZrSi2O7F2 P 2₁/a 2/m

56.02.04.03 Cuspidine Ca4Si2O7(F,OH)2 P 2₁/c 2/m

56.02.04.04 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 2₁/a 2/m

56.02.04.05 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 2₁/m 2/m

56.02.04.06 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m

56.02.04.07 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1

56.02.04.08 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1

56.02.04.09 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1

56.02.04.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 2₁/n 2/m

56.02.04.11 Jennite Ca9Si6O18(OH)6•8H2O P1 1

56.02.04.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2•3.5(H2O) Unk Ortho

56.02.04.13 Natrokomarovite* Na6CaNb6[Si4O12F2•4(H2O) C mmm 2/m 2/m 2/m

56.02.04.14 Suolunite Ca2Si2O5(OH)2•(H2O) F dd2 mm2

56.02.04.15 Mongolite Ca4Nb6Si5O24(OH)10•5(H2O) Unk Tetra

56.02.04.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1

56.02.04.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1

56.02.04.18 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 2₁ 2/m

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

References:

NAME( AmMin, 88:251) PHYS. PROP.(AmMin, 88:251) OPTIC PROP.(AmMin, 88:251)

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

Search for Kristiansenite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kristiansenite :

A Bijoux Google Search for Kristiansenite
Adam's Minerals Google Search for Kristiansenite
Cape Minerals Google Search for Kristiansenite
Dakota Matrix Minerals Google Search for Kristiansenite
Excalibur Mineral Corp. Google Search for Kristiansenite
Exceptional Minerals Google Search for Kristiansenite
John Betts Fine Minerals Search for Kristiansenite
McDougall Minerals Google Search for Kristiansenite
Mineral News Website Link
Rock and Mineral Shows Google Search for Kristiansenite
Weinrich Minerals, Inc. Google Search for Kristiansenite

Ask about Kristiansenite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Kristiansenite Specimen Label here :

Kristiansenite

Ca2ScSn(Si2O7)(Si2O6OH)
Dana No: 56.02.04.16 Strunz No: 09.BC.30
Locality:

Notes: