Kalipyrochlore Mineral Data

Kalipyrochlore Mineral Data +

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General Kalipyrochlore Information

Chemical Formula:

(H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K)

Composition:

Molecular Weight = 321.15 gm

Potassium 2.43 % K 2.93 % K₂O

Strontium 1.36 % Sr 1.61 % SrO

Titanium 2.98 % Ti 4.97 % TiO₂

Niobium 52.07 % Nb 74.49 % Nb₂O₅

Hydrogen 1.79 % H 15.99 % H₂O

Oxygen 39.36 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

·(H₂O)Sr_0.05Nb_1.8Ti_0.2O_4.1(OH)_1.9(H₂O)_0.9K_0.2

Environment:

Alluvial deposits and residual soils from a carbonatite deposit, formed from pyrochlore by the leaching of Na, Ca, and F in waters rich in K.

IMA Status:

Approved IMA 1978

Locality:

Lueshe carbonatite deposit, 150 km norht of Goma, Kivu Province, Congo (Zaire). Link to MinDat.org Location Data.

Name Origin:

Named for the pyrochlore mineral group and potassium (KALIum) although later work shows very little potassium in the formula.

Synonym:

ICSD 78666

PDF 30-991

Kalipyrochlore Image

Images:

Kalipyrochlore

Comments: Opaque yellowish green to tan octahedral crystal of kalipyrochlore.
Location: Lueshe, Nord-Kivu, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kalipyrochlore Crystallography

Cell Dimensions:

a = 10.604, Z = 8; V = 1,192.37 Den(Calc)= 3.58

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 3.07(1), 6.16(0.85), 3.21(0.75),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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Ercit T S , Hawthorne F C , Cerny P , The Canadian Mineralogist , 32 (1994) p.415-420, The structural chemistry of kalipyrochlore, a hydropyrochlore

Physical Properties of Kalipyrochlore

Color:

Green.

Density:

3.4 - 3.48, Average = 3.44

Diaphaniety:

Translucent to Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Resinous

Streak:

gray white

Optical Properties of Kalipyrochlore

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2682,KPDmeas= 0.2791,KC= 0.2816

Optical Data:

Isotropic, n=1.93-1.99.

Calculated Properties of Kalipyrochlore

Electron Density:

r_electron=3.27 gm/cc
note: r_{Kalipyrochlore}=3.44 gm/cc.

Fermion Index

Fermion Index = 0.005
Boson Index = 0.995

Photoelectric:

PE_{Kalipyrochlore}= 79.69 barns/electron
U=PE_{Kalipyrochlore} x r_electron= 260.85 barns/cc.

Radioactivity:

GRapi = 33.44 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Kalipyrochlore - barely detectable

Kalipyrochlore Classification

Dana Class:

8.2.1.2 (8)Multiple Oxides with Nb, Ta, and Ti

(8.2)where (A)2 (B2O6) (O,OH,F)

(8.2.1)Pyrochlore Group (Pyrochlore Subgroup; Nb>Ta;(Nb+Ta)>2(Ti)

8.2.1.1 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m

8.2.1.2 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m

8.2.1.3 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m

8.2.1.4 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3

8.2.1.5 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

8.2.1.6 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m

8.2.1.7 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

8.2.1.8 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m

8.2.1.9 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m

Strunz Class:

IV/C.17-30 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.17 - Pyrochlore group, Pyrochlore series with Nb > Ti

IV/C.17-10 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m

IV/C.17-20 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m

IV/C.17-30 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m

IV/C.17-40 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m

IV/C.17-50 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m

IV/C.17-60 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3

IV/C.17-70 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

IV/C.17-80 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m

IV/C.17-85 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m

IV/C.17-90 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

Other Kalipyrochlore Information

References:

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

See Also:

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

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Kalipyrochlore

(H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K)
Dana No: 8.2.1.2 Strunz No: IV/C.17-30
Locality:

Notes: