Rynersonite Mineral Data

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General Rynersonite Information

Chemical Formula:

Ca(Ta,Nb)2O6

Composition:

Molecular Weight = 453.95 gm

Calcium 8.83 % Ca 12.35 % CaO

Tantalum 59.79 % Ta 73.01 % Ta₂O₅

Niobium 10.23 % Nb 14.64 % Nb₂O₅

Oxygen 21.15 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaTa_1.5Nb_0.5O₆

Environment:

Alteration product of earlier Nb-Ta minerals in some granite pegmatites.

IMA Status:

Approved IMA 1978

Locality:

San Diego mine, Mesa Grande, San Diego Co., California. Link to MinDat.org Location Data.

Name Origin:

Named for Frederick James Rynerson (1882-1960), and his two sons, Buel Frederick Rynerson (1905- ) and Eugene Bonfoey Rynerson (1910- ), long-time pegmatite miners in San Diego Co., California, USA.

Name Pronunciation:

Rynersonite + Pronunciation

Synonym:

ICSD 24091

PDF 39-1430

Rynersonite Image

Images:

Rynersonite

Comments: Off-white fibrous rynersonite.
Location: Brown Derby No. 1 Mine, Gunnison County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Rynersonite Schiavinatoite

Comments: Brown, columnar schiavinatoite with minor white rynersonite sticks on quartz.
Location: Ampanodiana Sud, Tetezantsio, Mahaiza, Antananarivo, Madagascar. Scale: See Image.
© Jeff Weissman / Photographic Guide to Mineral Species

Rynersonite Crystallography

Axial Ratios:

a:b:c =0.6783:1:0.4854

Cell Dimensions:

a = 7.505, b = 11.063, c = 5.37, Z = 4; V = 445.86 Den(Calc)= 6.76

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmnb

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

By Intensity(I/I_o): 3.038(1), 2.964(0.91), 4.835(0.91),

Crystal Structure:

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Jahnberg L , Acta Chemica Scandinavica , 17 (1963) p.2548-2559, Crystal structure of orthorhombic CaTa2O6, Locality: synthetic

Physical Properties of Rynersonite

Cleavage:

None

Color:

Beige white, Pink.

Density:

6.402

Diaphaneity:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Sub Metallic

Streak:

white

Optical Properties of Rynersonite

Optical Data:

NCalc= 2.19 - from Gladstone-Dale relationship (KC = 0.1754) where Ncalc=Dcalc*KC+1
NCalc= 2.12 - from Gladstone-Dale relationship (KC = 0.1754) where Ncalc=Dmeas*KC+1

Calculated Properties of Rynersonite

Electron Density:

Bulk Density (Electron Density)=5.90 gm/cc
note: Specific Gravity of Rynersonite =6.76 gm/cc.

Fermion Index:

Fermion Index = 0.0002924427
Boson Index = 0.9997075573

Photoelectric:

PE_Rynersonite= 723.64 barns/electron
U=PE_Rynersonite x rElectron Density=4,267.32 barns/cc.

Radioactivity:

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

Rynersonite Classification

Dana Class:

08.03.07.02 (08)Multiple Oxides with Nb, Ta, and Ti

(08.03)where A (B2O6)

(08.03.07)Dana Group

08.03.07.01 Vigezzite (Ca,Ce)(Nb,Ta,Ti)2O6 Pmnb 2/m 2/m 2/m

08.03.07.02 Rynersonite Ca(Ta,Nb)2O6 Pmnb 2/m 2/m 2/m

Strunz Class:

04.DF.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DF -With large (± medium-sized) cations; dimers and trimers of edge-sharing octahedra

04.DF.05 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 Pmnb 2/m 2/m 2/m

04.DF.05 Aeschynite-(Nd) (Nd,Ce)(Ti,Nb)2(O,OH)6 Pmnb ? 2/m 2/m 2/m

04.DF.05 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Pbnm 2/m 2/m 2/m

04.DF.05 Nioboaeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m

04.DF.05 Nioboaeschynite-(Nd)! (Nd,Ce)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m

04.DF.05 Rynersonite Ca(Ta,Nb)2O6 Pmnb 2/m 2/m 2/m

04.DF.05 Tantalaeschynite-(Y) (Y,Ce,Ca)(Ta,Ti,Nb)2O6 Pbnm 2/m 2/m 2/m

04.DF.05 Vigezzite (Ca,Ce)(Nb,Ta,Ti)2O6 Pmnb 2/m 2/m 2/m

04.DF.05 Nioboaeschynite-(Y)! [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6 Pbnm 2/m 2/m 2/m

Other Rynersonite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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

Rynersonite

Ca(Ta,Nb)2O6
Dana No: 08.03.07.02 Strunz No: 04.DF.05
Locality:

Notes: