Tengerite-(Y) Mineral Data
General Tengerite-(Y) Information
Chemical Formula:
Y2(CO3)3•2-3(H2O)
Composition:
Molecular Weight = 402.88 gm
Yttrium 44.14 % Y 56.05 % Y2 O3
Hydrogen 1.25 % H 11.18 % H2 O
Carbon 8.94 % C 32.77 % CO2
Oxygen 45.67 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Y2 (CO3 )3 •2.5(H2 O)
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 - Pyramidal H-M Symbol (mm2) Space Group: Pb21m
X Ray Diffraction:
By Intensity(I/Io ): 4.58(1), 3.89(0.9), 7.53(0.9),
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:
PETengerite-(Y) = 54.22 barns/electronU=PETengerite-(Y) x r Electron 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
Search for Tengerite-(Y) using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Tengerite-(Y) :
Ask about Tengerite-(Y) 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
Espa�ol
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:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.