Sorensenite Mineral Data

General Sorensenite Information

Chemical Formula:

Na4SnBe2Si6O18•2(H2O)

Composition:

Molecular Weight = 721.23 gm

Sodium 12.75 % Na 17.19 % Na₂O

Beryllium 2.50 % Be 6.94 % BeO

Silicon 23.36 % Si 49.99 % SiO₂

Tin 16.46 % Sn 20.90 % SnO₂

Hydrogen 0.56 % H 5.00 % H₂O

Oxygen 44.37 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₄SnBe₂Si₆O₁₈•2(H₂O)

Environment:

Nepheline syenite.

IMA Status:

Approved IMA 1965

Locality:

Nakalaq in the Ilimaussaq intrusion complex, Greenland. Link to MinDat.org Location Data.

Name Origin:

Named for Henning Sorensen (1926-), emeritus professor, Hakkaido University, Sapporo.

Name Pronunciation:

Sorensenite + Pronunciation

Synonym:

ICSD 34071

PDF 29-1178

Sorensenite Image

Images:

Sorensenite

Comments: Translucent white prismatic sorensenite crystals and crystalline in dark aegirine.
Location: Kvanefjeld, Ilimaussaq, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Sorensenite

Comments: Lght pink, prismatic crystals of sorensite to 5mm in dark green aegerine matrix.
Location: Kvanefjeld, Ilimaussaq, Greenland. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Sorensenite Crystallography

Axial Ratios:

a:b:c =2.7887:1:1.6218

Cell Dimensions:

a = 20.698, b = 7.422, c = 12.037, Z = 4; beta = 117.28° V = 1,643.47 Den(Calc)= 2.91

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 2.918(1), 2.96(0.85), 3.41(0.85),

Physical Properties of Sorensenite

Cleavage:

{???} Distinct, {???} Distinct

Color:

Colorless, Pinkish, Milky white.

Density:

2.9

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5.5 - Knife Blade

Luminescence:

Fluorescent, Long UV=blue white white.

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Sorensenite

Gladstone-Dale:

CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1999,KPDmeas= 0.2006,KC= 0.2001
Ncalc = 1.58

Optical Data:

Biaxial (-), a=1.576-1.579, b=1.581-1.585, g=1.584-1.586, bire=0.0070-0.0080

Pleochroism (x):

anomalous yellow brown.

Pleochroism (y):

anomalous yellow brown.

Pleochroism (z):

anomalous blue.

Calculated Properties of Sorensenite

Electron Density:

Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Sorensenite =2.91 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Sorensenite= 47.86 barns/electron
U=PE_Sorensenite x rElectron Density= 135.18 barns/cc.

Radioactivity:

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

Sorensenite Classification

Dana Class:

65.02.04.01 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.02)with chains P=3

(65.02.04)Dana Group

65.02.04.01 Sorensenite Na4SnBe2Si6O18•2(H2O) C 2/c 2/m

Strunz Class:

09.DG.30 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DG -Inosilicates with 3-periodic single and multiple chains

09.DG.30 Sorensenite Na4SnBe2Si6O18•2(H2O) C 2/c 2/m

Other Sorensenite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8;Collectors Book of Fluorescent Minerals) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Sorensenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Sorensenite

Na4SnBe2Si6O18•2(H2O)
Dana No: 65.02.04.01 Strunz No: 09.DG.30
Locality:

Notes:

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