Karupmollerite-Ca Mineral Data

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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 % K₂O

Barium 0.23 % Ba 0.25 % BaO

Sodium 1.59 % Na 2.15 % Na₂O

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 % Nb₂O₅

Aluminum 0.13 % Al 0.25 % Al₂O₃

Zinc 0.05 % Zn 0.07 % ZnO

Iron 0.32 % Fe 0.46 % Fe₂O₃

Silicon 18.48 % Si 39.53 % SiO₂

Hydrogen 1.25 % H 11.21 % H₂O

Oxygen 46.21 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na_0.84Ca_0.64K_0.44Ba_0.02Sr_0.01Ca_0.64Mn²⁺_0.05Zn_0.01Nb_2.7Ti_1.28Fe³⁺_0.07Si_7.97Al_0.06O_24.09 OH_1.23O_2.75·6.92(H₂O)

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

Comments: Small white fragment of kaupmollerite-Ca in a geletin capsule.
Location: Mellemelv, Ilimaussaq, Greenland. Scale: Capsule Size 1 cm.
© Sergey Vasiliev / Systematic Mineralogy

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 - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_{Karupmollerite-Ca}= 33.30 barns/electron
U=PE_{Karupmollerite-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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Print or Cut-and-Paste your Karupmollerite-Ca Specimen Label here :

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
Locality:

Notes: