Kirschsteinite Mineral Data (original) (raw)
General Kirschsteinite Information
Chemical Formula:
CaFe++SiO4
Composition:
Molecular Weight = 188.01 gm
Calcium 21.32 % Ca 29.83 % CaO
Iron 29.70 % Fe 38.21 % FeO
Silicon 14.94 % Si 31.96 % SiO2
Oxygen 34.04 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
CaFe2+(SiO4)
Environment:
In melilite-nephelinite lava.
IMA Status:
Valid Species (Pre-IMA) 1957
Locality:
Mt. Shaheru, the extinct southern cone of Mt. Nyiragongo, Kivu Province, Congo (Zaire). Link to MinDat.org Location Data.
Name Origin:
Named for Egon Kirschstein, German geologist, a pioneer in the geological exploration of Kivu Province, Congo (Zaire).
Name Pronunciation:
Kirschsteinite + Pronunciation 
Synonym:
ICSD 83824
PDF 34-98
Kirschsteinite Image
Images:
Kirschsteinite Crystallography
Axial Ratios:
a:b:c =0.4367:1:0.5774
Cell Dimensions:
a = 4.877, b = 11.166, c = 6.448, Z = 4; V = 351.14 Den(Calc)= 3.56
Crystal System:
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbmn
X Ray Diffraction:
By Intensity(I/Io): 2.949(1), 2.68(0.85), 2.604(0.8),
Crystal Structure:
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| | Folco L , Mellini M , European Journal of Mineralogy , 9 (1997) p.969-973, Crystal chemistry of meteoritic kirschsteinite, Sample: KIR1 View Additional jPOWD Structure files for Kirschsteinite [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
Physical Properties of Kirschsteinite
Color:
Colorless, Light green.
Density:
3.434
Diaphaneity:
Transparent to Translucent
Hardness:
5.5 - Knife Blade
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Kirschsteinite
Gladstone-Dale:
CI meas= -0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1983,KPDmeas= 0.2056,KC= 0.201
Ncalc = 1.69 - 1.72
Optical Data:
Biaxial (-), a=1.674-1.693, b=1.694-1.734, g=1.706-1.735, bire=0.0320-0.0420, 2V(Calc)=16-74, 2V(Meas)=50.
Pleochroism (x):
colorless.
Pleochroism (y):
colorless.
Pleochroism (z):
colorless.
Calculated Properties of Kirschsteinite
Electron Density:
Bulk Density (Electron Density)=3.48 gm/cc
note: Specific Gravity of Kirschsteinite =3.56 gm/cc.
Fermion Index:
Fermion Index = 0.01
Boson Index = 0.99
Photoelectric:
PEKirschsteinite = 12.06 barns/electron
U=PEKirschsteinite x rElectron Density= 42.01 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kirschsteinite is Not Radioactive
Kirschsteinite Classification
Dana Class:
51.03.02.02 (51)Nesosilicate Insular SiO4 Groups Only
(51.03)with all cations in octahedral [6] coordination
(51.03.02)Monticellite - Kirschsteinite series
51.03.02.01 Monticellite CaMgSiO4 P nma 2/m 2/m 2/m
51.03.02.02 Kirschsteinite CaFeSiO4 Pbmn 2/m 2/m 2/m
51.03.02.03 Glaucochroite CaMnSiO4 Pbnm 2/m 2/m 2/m
Strunz Class:
09.AC.05 09 - SILICATES (Germanates)
09.A - Nesosilicates
09.AC -Nesosilicates without additional anions;
09.AC.05 Forsterite Mg2SiO4 Pbnm 2/m 2/m 2/m
09.AC.05 Glaucochroite CaMnSiO4 Pbnm 2/m 2/m 2/m
09.AC.05 Fayalite Fe2SiO4 Pbnm 2/m 2/m 2/m
09.AC.05 Olivine* (Mg,Fe)2SiO4 Pbnm 2/m 2/m 2/m
09.AC.05 Kirschsteinite CaFeSiO4 Pbmn 2/m 2/m 2/m
09.AC.05 Laihunite FeFe2(SiO4)2 P 21/b 2/m
09.AC.05 Liebenbergite (Ni,Mg)2SiO4 Pbnm 2/m 2/m 2/m
09.AC.05 Tephroite Mn2SiO4 P nma 2/m 2/m 2/m
Other Kirschsteinite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
See Also:
Links to other databases for Kirschsteinite :
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
15 - University of Colorado - Mineral Structure Data
16 - WWW-MINCRYST
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Print or Cut-and-Paste your Kirschsteinite Specimen Label here :
Kirschsteinite
CaFe++SiO4
Dana No: 51.03.02.02 Strunz No: 09.AC.05
Locality:
Notes: