Glushinskite Mineral Data
General Glushinskite Information
Chemical Formula:
Mg(C2O4)•2(H2O)
Composition:
Molecular Weight = 148.36 gm
Magnesium 16.38 % Mg 27.17 % MgO
Hydrogen 2.72 % H 24.29 % H2 O
Carbon 16.19 % C 48.55 % C2 O3
Oxygen 64.71 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mg(C2 O4 )•2(H2 O)
Environment:
Formed by reaction between Mg-rich minerals and oxalic acid secreted by incrusting lichen.
IMA Status:
Approved IMA 1987
Locality:
Mill of Johnston, six km west-southwest of Insch, Kincardineshire, and on the Island of Rhum, Inner Hebrides. Scotland. Link to MinDat.org Location Data.
Name Origin:
Named for Petr Ivanovich Glushinskii (1908- ), coal geologist, Institute of Arctic and Antarctic Geology, St. Petersburg, Russia.
Name Pronunciation:
Glushinskite + Pronunciation
Synonym:
Magnesium Oxalate
Glushinskite Image
Images:
Images:
Glushinskite
Comments: SEM photo of two large euhedral glushinskite crystals partially embedded in the dried, rotten saguaro matrix. (AmMin, 88:1883).
Location: Crystals associated with the remains of a saguaro, Carnegiea gigantea from south and west central Arizona.
Scale: Scale bar 150 µ-m.
© American Mineralogist
Glushinskite Crystallography
Axial Ratios:
a:b:c =2.3446:1:1.8468
Cell Dimensions:
a = 12.675, b = 5.406, c = 9.984, Z = 4; beta = 129.45° V = 528.26 Den(Calc)= 1.87
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io ): 4.89(1), 3.179(0.7), 2.039(0.6),
Physical Properties of Glushinskite
Color:
White, White, Colorless.
Density:
1.85
Streak:
white
Optical Properties of Glushinskite
Gladstone-Dale:
CI meas = -0.961 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = -0.94 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2656,KPDmeas = 0.2685,KC = 0.1369 Ncalc = 1.25 - 1.26
Optical Data:
Biaxial (-), a=1.365, b=1.53, g=1.595, bire=0.2300
Calculated Properties of Glushinskite
Electron Density:
Bulk Density (Electron Density)=1.92 gm/cc note: Specific Gravity of Glushinskite =1.87 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEGlushinskite = 0.61 barns/electronU=PEGlushinskite x r Electron Density= 1.17 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Glushinskite is Not Radioactive
Glushinskite Classification
Dana Class:
50.01.03.02 (50) Salts of Organic Acids
(50.01) (Oxalates)
(50.01.03) Humboldtine Group
50.01.03.01 Humboldtine Fe(C2O4)•2(H2O) I2/a 2/m
50.01.03.02 Glushinskite Mg(C2O4)•2(H2O) C 2/c 2/m
50.01.03.03 Lindbergite ! Mn(C2O4)•2(H2O) C 2/c 2/m
Strunz Class:
10.AB.10 10 - ORGANIC COMPOUNDS
10.A - Salts of Organic Acids
10.AB -Oxalates
10.AB.10 Glushinskite Mg(C2O4)•2(H2O) C 2/c 2/m
Other Glushinskite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Glushinskite :
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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Glushinskite
Mg(C2O4)•2(H2O)
Dana No: 50.01.03.02 Strunz No: 10.AB.10
Locality:
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