Kribergite Mineral Data

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.

Name Pronunciation:

Kribergite + Pronunciation

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:

Triclinic Space 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= -0.147 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2495,KPDmeas= 0.2508,KC= 0.2175
Ncalc = 1.42

Optical Data:

Biaxial (?), b=1.484

Calculated Properties of Kribergite

Electron Density:

Bulk Density (Electron Density)=1.95 gm/cc
note: Specific Gravity of Kribergite =1.94 gm/cc.

Fermion Index:

Fermion Index = 0.0006503629
Boson Index = 0.9993496371

Photoelectric:

PE_Kribergite= 1.61 barns/electron
U=PE_Kribergite x rElectron Density= 3.14 barns/cc.

Radioactivity:

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

Kribergite Classification

Dana Class:

43.05.07.01 (43)Compound Phosphates, etc.

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

(43.05.07)Dana Group

43.05.07.01 Kribergite Al5(PO4)3(SO4)(OH)4•4(H2O) P1 or P1 Tri

Strunz Class:

08.DC.52 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1

08.DC.52 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Kribergite

Al5(PO4)3(SO4)(OH)4•4(H2O)
Dana No: 43.05.07.01 Strunz No: 08.DC.52
Locality:

Notes: