Rimkorolgite Mineral Data
General Rimkorolgite Information
Chemical Formula:
Mg5Ba(PO4)4•8(H2O)
Composition:
Molecular Weight = 782.86 gm
Barium 17.54 % Ba 19.59 % BaO
Magnesium 15.52 % Mg 25.74 % MgO
Phosphorus 15.83 % P 36.26 % P2 O5
Hydrogen 2.06 % H 18.41 % H2 O
Oxygen 49.05 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mg5 Ba(PO4 )4 •8(H2 O)
Environment:
In cavities in dolomitic carbonatites. Structure closely related to bakhchisaraitsevite.
IMA Status:
Approved IMA 1995 (Dana # Added)
Locality:
Kovdor iron deposit, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Name Origin:
For Olga M. Rimskaya-Konsakova (1914-1987), Russian mineralogist from St. Petersbug University.
Name Pronunciation:
Rimkorolgite + Pronunciation
Synonym:
IMA1990-032
Rimkorolgite Image
Images:
Rimkorolgite Crystallography
Axial Ratios:
a:b:c =0.6496:1:1.4273
Cell Dimensions:
a = 8.3354, b = 12.8304, c = 18.313, Z = 4; beta = 90.2° V = 1,958.50 Den(Calc)= 2.65
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /c
X Ray Diffraction:
By Intensity(I/Io ): 10.51(1), 3.081(0.78), 2.969(0.44),
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Physical Properties of Rimkorolgite
Cleavage:
{001} Perfect
Color:
Yellowish brown, Pink.
Density:
2.67
Diaphaneity:
Transparent to translucent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Fibrous - Crystals made up of fibers.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Pseudo Hexagonal - Crystals show a hexagonal outline.
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Silky
Streak:
white
Optical Properties of Rimkorolgite
Gladstone-Dale:
CI meas = -0.01 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.017 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2091,KPDmeas = 0.2075,KC = 0.2055 Ncalc = 1.54 - 1.55
Optical Data:
Biaxial (+), a=1.552, b=1.552, g=1.558, bire=0.0060, 2V(Calc)=0, 2V(Meas)=23.
Pleochroism (x):
colorless.
Pleochroism (y):
colorless.
Pleochroism (z):
colorless.
Calculated Properties of Rimkorolgite
Electron Density:
Bulk Density (Electron Density)=2.62 gm/cc note: Specific Gravity of Rimkorolgite =2.67 gm/cc.
Fermion Index:
Fermion Index = 0.04 Boson Index = 0.96
Photoelectric:
PERimkorolgite = 72.85 barns/electronU=PERimkorolgite x r Electron Density= 190.82 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Rimkorolgite is Not Radioactive
Rimkorolgite Classification
Dana Class:
40.05.15.01 (40) Hydrated Phosphates, etc
(40.05) with miscellaneous formulae
(40.05.15) Dana Group
40.05.15.01 Rimkorolgite ! Mg5Ba(PO4)4•8(H2O) P 21 /c 2/m
40.05.15.02 IMA2008-048 ! Zn6(PO4)4•7H2O P1 1
Strunz Class:
08.CH.45 08 - PHOSPHATES, ARSENATES, VANADATES
08.C - Phosphates without Additional Anions, with H2O
08.CH -With large and medium-sized cations, RO4:H2O < 1:1
08.CH.45 Rimkorolgite ! Mg5Ba(PO4)4•8(H2O) P 21 /c 2/m
Other Rimkorolgite Information
References:
NAME( MinRec) PHYS. PROP.(Am.Min., v 81, v 87, p 1735) OPTIC PROP.(MinRec)
See Also:
Links to other databases for Rimkorolgite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Rimkorolgite Specimen Label here :
Rimkorolgite
Mg5Ba(PO4)4•8(H2O)
Dana No: 40.05.15.01 Strunz No: 08.CH.45
Locality:
Notes:
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