Tengerite-(Y) Mineral Data

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General Tengerite-(Y) Information

Chemical Formula:

Y2(CO3)3•2-3(H2O)

Composition:

Molecular Weight = 402.88 gm

Yttrium 44.14 % Y 56.05 % Y₂O₃

Hydrogen 1.25 % H 11.18 % H₂O

Carbon 8.94 % C 32.77 % CO₂

Oxygen 45.67 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Y₂(CO₃)₃•2.5(H₂O)

Environment:

Alteration product of gadolinite.

IMA Status:

Valid Species (Pre-IMA) 1838

Locality:

Ytterby, northeast of Stockholm, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for C. Tenger, Swedish geologist.

Name Pronunciation:

Tengerite-(Y) + Pronunciation

Synonym:

ICSD 72940

PDF 47-1828

Tengerite-(Y) Image

Images:

Tengerite-(Y)

Comments: White microcrystalline tengerite-(Y) seams on matrix.
Location: Evans-Lou Quarry, Quebec, Canada. Scale: Specimen Size 2x3 cm.
© Diederik Visser

Images:

Tengerite-(Y)

Comments: Pearly white platy tengerite-(Y) crystals in radial sprays to 2mm and fine layers on matrix. Partially replaced by an unidentified green mineral with bright blue centers that is probable decrespignyite-(Y).
Location: Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia. Scale: Overall: 4.5 x 1 x 4 cm.
© Tom Loomis / Dakota Matrix

Tengerite-(Y) Crystallography

Axial Ratios:

a:b:c =0.6637:1:1.6505

Cell Dimensions:

a = 6.078, b = 9.157, c = 15.114, Z = 4; V = 841.19 Den(Calc)= 3.18

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pb21m

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

By Intensity(I/I_o): 4.58(1), 3.89(0.9), 7.53(0.9),

Crystal Structure:

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Miyawaki R , Kuriyama J , Nakai I , American Mineralogist , 78 (1993) p.425-432, The redefinition of tengerite-(Y), Y2(CO3)3.2-3H2O, and its crystal structure

Physical Properties of Tengerite-(Y)

Color:

White.

Density:

3.12

Diaphaneity:

Transparent to translucent

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Pulverulent - Forms a loose, poorly-coherent powdery mass.

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Tengerite-(Y)

Gladstone-Dale:

CI meas= 0.064 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.082 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1858,KPDmeas= 0.1894,KC= 0.2024
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (+), a=1.587, b=1.57, g=1.616, bire=0.0290

Calculated Properties of Tengerite-(Y)

Electron Density:

Bulk Density (Electron Density)=2.99 gm/cc
note: Specific Gravity of Tengerite-(Y) =3.12 gm/cc.

Fermion Index:

Fermion Index = 0.0012049212
Boson Index = 0.9987950788

Photoelectric:

PE_{Tengerite-(Y)}= 54.22 barns/electron
U=PE_{Tengerite-(Y)} x rElectron Density= 162.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tengerite-(Y) is Not Radioactive

Tengerite-(Y) Classification

Dana Class:

15.04.03.01 (15)Hydrated Carbonates

(15.04)Dana Type

(15.04.03)Dana Group

15.04.03.01 Tengerite-(Y) Y2(CO3)3•2-3(H2O) Pb21m mm2

Strunz Class:

05.CC.10 05 - CARBONATES (NITRATES)

05.C - Carbonates without Additional Anions, with H2O

05.CC -With rare-earth elements (REE)

05.CC.10 Tengerite-(Y) Y2(CO3)3•2-3(H2O) Pb21m mm2

Other Tengerite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Ask about Tengerite-(Y) here :
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Print or Cut-and-Paste your Tengerite-(Y) Specimen Label here :

Tengerite-(Y)

Y2(CO3)3•2-3(H2O)
Dana No: 15.04.03.01 Strunz No: 05.CC.10
Locality:

Notes: