Paraniite-(Y) Mineral Data

General Paraniite-(Y) Information

Chemical Formula:

Ca2Y(AsO4)(WO4)2

Composition:

Molecular Weight = 803.68 gm

Calcium 9.97 % Ca 13.96 % CaO

Yttrium 11.06 % Y 14.05 % Y₂O₃

Arsenic 9.32 % As 14.30 % As₂O₅

Tungsten 45.75 % W 57.70 % WO₃

Oxygen 23.89 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Y(AsO₄)(WO₄)₂

Environment:

Found in a fissure in gneiss in an area anomalously high in arsenic.

IMA Status:

Approved IMA 1992

Locality:

On the east flank of Pizzo Cervandone, Alpe Devero, Valle d’Ossola, Piedmont, Italy Link to MinDat.org Location Data.

Name Origin:

Named for Fausto Parani, amateur mineral collector of Montecrestese, Italy, who found the mineral.

Name Pronunciation:

Paraniite-(Y) + Pronunciation

Synonym:

IMA1992-018

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Paraniite-(Y) Crystallography

Axial Ratios:

a:c = 1:6.59824

Cell Dimensions:

a = 5.135, c = 33.882, Z = 4; V = 893.41 Den(Calc)= 5.97

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4₁/a

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

By Intensity(I/I_o): 3.054(1), 1.56(0.32), 1.899(0.32),

Crystal Structure:

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Demartin F , Gramaccioli C M , Pilati T , Acta Crystallographica, Section C , 48 (1992) p.1357-1359, Structure of a new natural tungstate arsenate, [Ca2Y(AsO4)(WO4)2], structurally, related to scheelite, Locality: Alpine fissures, Pizzo Cervandone area, Ossola Valley, Italy, Note: anisoU s from ICSD

Physical Properties of Paraniite-(Y)

Color:

Yellow.

Diaphaneity:

Translucent

Luster:

Vitreous (Glassy)

Optical Properties of Paraniite-(Y)

Gladstone-Dale:

CI calc= 0.143 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1499,KC= 0.175
Ncalc = 2.04

Optical Data:

Uniaxial (+), w=1.87, e=1.92, bire=0.0500.

Calculated Properties of Paraniite-(Y)

Electron Density:

Bulk Density (Electron Density)=5.29 gm/cc
note: Specific Gravity of Paraniite-(Y) =5.97 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_{Paraniite-(Y)}= 580.07 barns/electron
U=PE_{Paraniite-(Y)} x rElectron Density=3,067.96 barns/cc.

Radioactivity:

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

Paraniite-(Y) Classification

Dana Class:

49.04.07.01 (49)Basic and Hydrated Molybdates and Tungstates

(49.04)(Compound Anions)

(49.04.07)Dana Group

49.04.07.01 Paraniite-(Y) Ca2Y(AsO4)(WO4)2 I 4₁/a 4/m

Strunz Class:

07.GA.15 07 - SULFATES (SELENATES, TELLURATES)

07.G - Molybdates, Wolframates and Niobates

07.GA -Without additional anions or H2O

07.GA.15 Paraniite-(Y) Ca2Y(AsO4)(WO4)2 I 4₁/a 4/m

Other Paraniite-(Y) Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.80,p631,1995) OPTIC PROP.(Am.Min.,Vol.80,p631,1995)

See Also:

Links to other databases for Paraniite-(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

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Print or Cut-and-Paste your Paraniite-(Y) Specimen Label here :

Paraniite-(Y)

Ca2Y(AsO4)(WO4)2
Dana No: 49.04.07.01 Strunz No: 07.GA.15
Locality:

Notes: