Kribergite Mineral Data

Kribergite Mineral Data +

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General Kribergite Information

Chemical Formula:

Al5(PO4)3(SO4)(OH)4·4(H2O)

Composition:

Molecular Weight = 655.98 gm

Aluminum 20.57 % Al 38.86 % Al₂O₃

Phosphorus 14.17 % P 32.46 % P₂O₅

Hydrogen 1.84 % H 16.48 % H₂O

Sulfur 4.89 % S 12.21 % SO₃

Oxygen 58.54 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al₅(PO₄)₃(SO₄)(OH)₄·4(H₂O)

Environment:

Vienlets.

IMA Status:

Valid Species (Pre-IMA) 1945

Locality:

Kristineberg mine, Vasterbotten, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

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Kribergite Crystallography

Axial Ratios:

a:b:c =1.3405:1:0.5547

Cell Dimensions:

a = 18.123, b = 13.519, c = 7.5, Z = 2; alpha = 70.5°, beta = 117.87°, gamma = 136.23° V = 1,059.25 Den(Calc)= 2.06

Crystal System:

TriclinicSpace Group: P1 or P1

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

By Intensity(I/I_o): 11.6(1), 6.62(0.3), 5.02(0.3),2.86(0.1), 2.93(0.1), 5.37(0.1), 5.72(0.1), 5.85(0.1),

Physical Properties of Kribergite

Color:

White.

Density:

1.92 - 1.94, Average = 1.93

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Kribergite

Gladstone-Dale:

CI meas= -0.153 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.08 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.235,KPDmeas= 0.2508,KC= 0.2175

Optical Data:

Biaxial (?), b=1.484

Calculated Properties of Kribergite

Electron Density:

r_electron=2.07 gm/cc
note: r_Kribergite=2.06 gm/cc.

Fermion Index

Fermion Index = 0.00065
Boson Index = 0.99935

Photoelectric:

PE_Kribergite= 1.61 barns/electron
U=PE_Kribergite x r_electron= 3.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kribergite is Not Radioactive

Kribergite Classification

Dana Class:

43.5.7.1 (43)Compound Phosphates, etc.

(43.5)(Hydrated Compound Anions With Hydroxyl or Halogen)

(43.5.7)Dana Group

43.5.7.1 Kribergite Al5(PO4)3(SO4)(OH)4·4(H2O) P1 or P1 Tri

Strunz Class:

VII/D.12-40 VII - Phosphates, Arsenates and Vanadates

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

VII/D.12 - Sasaite - Kribergite ? series

VII/D.12-03 Mitryaevaite! Al5[(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48(H2O) P1 1

VII/D.12-05 Sasaite (Al,Fe)14(PO4)11(SO4)(OH)7·84(H2O) P 222 or Pmm2 or P mmm Ortho

VII/D.12-10 Vashegyite Al11(PO4)9(OH)6·38(H2O)orAl6(PO4)5(OH)3·23(H2O) Pna2 or P na2₁ mm2

VII/D.12-20 Vantasselite Al4(PO4)3(OH)3·9(H2O) Pma2,P 2₁am,Pmam Ortho

VII/D.12-30 Sanjuanite Al2(PO4)(SO4)(OH)·9(H2O) P1 or P1 Tri

VII/D.12-40 Kribergite Al5(PO4)3(SO4)(OH)4·4(H2O) P1 or P1 Tri

Other Kribergite 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 Kribergite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Kribergite

Al5(PO4)3(SO4)(OH)4·4(H2O)
Dana No: 43.5.7.1 Strunz No: VII/D.12-40
Locality:

Notes: