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 % Al2 O3
Phosphorus 14.17 % P 32.46 % P2 O5
Hydrogen 1.84 % H 16.48 % H2 O
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(H2 O)
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEKribergite = 1.61 barns/electronU=PEKribergite x r Electron 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: