Karupmollerite-Ca Mineral Data
General Karupmollerite-Ca Information
Chemical Formula:
(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O)
Composition:
Molecular Weight = 1,211.35 gm
Potassium 1.42 % K 1.71 % K2 O
Barium 0.23 % Ba 0.25 % BaO
Sodium 1.59 % Na 2.15 % Na2 O
Strontium 0.07 % Sr 0.09 % SrO
Calcium 4.23 % Ca 5.93 % CaO
Titanium 5.06 % Ti 8.44 % TiO2
Manganese 0.23 % Mn 0.29 % MnO
Niobium 20.71 % Nb 29.62 % Nb2 O5
Aluminum 0.13 % Al 0.25 % Al2 O3
Zinc 0.05 % Zn 0.07 % ZnO
Iron 0.32 % Fe 0.46 % Fe2 O3
Silicon 18.48 % Si 39.53 % SiO2
Hydrogen 1.25 % H 11.21 % H2 O
Oxygen 46.21 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Na0.84 Ca0.64 K0.44 Ba0.02 Sr0.01 Ca0.64 Mn2+ 0.05 Zn0.01 Nb2.7 Ti1.28 Fe3+ 0.07 Si7.97 Al0.06 O24.09
OH1.23 O2.75 �6.92(H2 O)
Environment:
Found replacing epistolite which was derived from vuonnemite. (labuntsovite group; structure refined)
IMA Status:
Approved IMA 2002 (Dana # Added)
Locality:
Ilimaussaq alkaline complex, South Greenland. Link to MinDat.org Location Data.
Name Origin:
Named for Svend Karup-Moller (1936-), Danish mineralogist.
Synonym:
IMA2001-028
Karupmollerite-Ca Image
Images:
Karupmollerite-Ca Crystallography
Axial Ratios:
a:b:c =1.03:1:0.5568
Cell Dimensions:
a = 14.641, b = 14.214, c = 7.9148, Z = 2; beta = 117.36° V = 1,462.87 Den(Calc)= 2.75
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
X Ray Diffraction:
By Intensity(I/Io ): 7.026(1)(001), 4.996(0.74)(021), 7.104(0.73)(020), 3.171(0.56)(041), 6.482(0.45)(201 ), 3.15(0.38), 3.253(0.38),
Physical Properties of Karupmollerite-Ca
Cleavage:
None
Color:
White, Grayish white, Pinkish white.
Density:
2.71
Diaphaneity:
Translucent
Habit:
Platy - Sheet forms (e.g. micas).
Habit:
Pseudomorphous - Occurs in the form of another mineral.
Hardness:
5 - Apatite
Luster:
Vitreous - Dull
Streak:
white
Optical Properties of Karupmollerite-Ca
Gladstone-Dale:
CI meas = 0.003 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = 0.018 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2513,KPDmeas = 0.255,KC = 0.2559 Ncalc = 1.69 - 1.7
Calculated Properties of Karupmollerite-Ca
Electron Density:
Bulk Density (Electron Density)=2.66 gm/cc note: Specific Gravity of Karupmollerite-Ca =2.71 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEKarupmollerite-Ca = 33.30 barns/electronU=PEKarupmollerite-Ca x r electron = 88.56 barns/cc.
Radioactivity:
GRapi = 20.09 (Gamma Ray American Petroleum Institute Units)
Concentration of Karupmollerite-Ca per GRapi unit = 4.98 (%)
Estimated Radioactivity from Karupmollerite-Ca - barely detectable
Karupmollerite-Ca Classification
Dana Class:
60.01.03c.03 (60) Cyclosilicate Four-Membered Rings
(60.01) as Titanosilicates
(60.01.03c) Labuntsovite Group (Kuzmenkoite subgroup Monoclinic [C2/m])
60.01.03c.01 Kuzmenkoite-Mn ! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O) C 2/m 2/m
60.01.03c.02 Kuzmenkoite-Zn ! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4•6-8(H2O) Cm m
60.01.03c.03 Karupmollerite-Ca ! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m
60.01.03c.04 Lepkhenelmite-Zn ! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m
Strunz Class:
09.CE.30c 09 - SILICATES (Germanates)
09.C - Cyclosilicates
09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
09.CE.30c Gjerdingenite-Mn ! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m
09.CE.30c Karupmollerite-Ca ! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O) C 2/m 2/m
09.CE.30c Kuzmenkoite-Zn ! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4•6-8(H2O) Cm m
09.CE.30c Kuzmenkoite-Mn ! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4•5(H2O) C 2/m 2/m
09.CE.30c Gjerdingenite-Fe ! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]•4(H2O) C 2/m 2/m
09.CE.30c Lepkhenelmite-Zn ! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4•7(H2O) Cm m
09.CE.30c Gjerdingenite-Ca ! K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O C 2/m 2/m
09.CE.30c Gjerdingenite-Na ! (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O C 2/m 2/m
09.CE.30c Burovaite-Ca ! (K,Na)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8•12H2O C 2/m 2/m
Other Karupmollerite-Ca Information
References:
NAME( AmMin, v 88, p 932) PHYS. PROP.(AmMin, v 88, p 932) OPTIC PROP.(AmMin, v 88, p 932)
See Also:
Links to other databases for Karupmollerite-Ca :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Karupmollerite-Ca
(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•7(H2O)
Dana No: 60.01.03c.03 Strunz No: 09.CE.30c
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