Kingite Mineral Data

Kingite Mineral Data +

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General Kingite Information

Chemical Formula:

Al3(PO4)2(F,OH)2·8(H2O,OH)

Composition:

Molecular Weight = 455.79 gm

Aluminum 18.94 % Al 35.79 % Al₂O₃

Phosphorus 13.59 % P 31.14 % P₂O₅

Hydrogen 3.16 % H 28.26 % H₂O

Oxygen 57.22 % O

Fluorine 7.09 % F 7.09 % F

- % F -2.98 % -O=F₂

______ ______

100.00 % 99.30 % = TOTAL OXIDE

Empirical Formula:

Al_3.2(PO₄)₂F_1.7(OH)_0.3·6(H₂O)2(OH)

Environment:

Small fine-grained nodules in a phosphate deposit.

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

Fairview mine, Robertstown, Burra County, SA, Australia. Link to MinDat.org Location Data.

Name Origin:

Named for D. King, 1926-1990), geologist, Department of Mines, SA, Australia.

Kingite Image

Images:

Kingite

Comments: White flakes of kingite in matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Kingite Crystallography

Axial Ratios:

a:b:c =0.9272:1:0.7058

Cell Dimensions:

a = 9.377, b = 10.113, c = 7.138, Z = 2; alpha = 97.6°, beta = 100.88°, gamma = 96.01° V = 655.27 Den(Calc)= 2.31

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 9.1(1), 3.45(0.8), 3.48(0.65),

Crystal Structure:

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Wallwork K S , Pring A , Taylor M R , Hunter B A , American Mineralogist , 88 (2003) p.235-239, A model for the structure of the hydrated aluminum phosphate, kingite, determined by ab initio powder diffraction methods

View Additional jPOWD Structure files for Kingite
[1]

Physical Properties of Kingite

Color:

White.

Density:

2.2 - 2.3, Average = 2.25

Diaphaniety:

Translucent

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Habit:

Platy - Sheet forms (e.g. micas).

Streak:

white

Optical Properties of Kingite

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2225,KPDmeas= 0.2284,KC= 0.2305

Optical Data:

Biaxial (?), b=1.514

Calculated Properties of Kingite

Electron Density:

r_electron=2.29 gm/cc
note: r_Kingite=2.25 gm/cc.

Fermion Index

Fermion Index = 0.00027
Boson Index = 0.99973

Photoelectric:

PE_Kingite= 1.31 barns/electron
U=PE_Kingite x r_electron= 3.00 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kingite is Not Radioactive

Kingite Classification

Dana Class:

42.10.3.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.10)where (AB)3 (XO4)2 Zq · x(H2O)

(42.10.3)Dana Group

42.10.3.1 Kingite Al3(PO4)2(F,OH)2·8(H2O,OH) P1 1

Strunz Class:

VII/D.13-20 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.13 - Wavellite - KINGITE series

VII/D.13-10 Wavellite Al3(PO4)2(OH,F)3·5(H2O) Pcmn 2/m 2/m 2/m

VII/D.13-20 Kingite Al3(PO4)2(F,OH)2·8(H2O,OH) P1 1

Other Kingite Information

References:

NAME( Dana8) PHYS. PROP.(AmMin, Vol 87, p 235) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Kingite

Al3(PO4)2(F,OH)2·8(H2O,OH)
Dana No: 42.10.3.1 Strunz No: VII/D.13-20
Locality:

Notes: