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Gjerdingenite-Na Mineral Data |
General Gjerdingenite-Na Information |
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(K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O | ||
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Molecular Weight = 1,175.50 gm | ||
Potassium 3.26 % K 3.93 % K2O | |||
Barium 0.82 % Ba 0.91 % BaO | |||
Sodium 2.97 % Na 4.01 % Na2O | |||
Calcium 1.40 % Ca 1.96 % CaO | |||
Titanium 6.07 % Ti 10.12 % TiO2 | |||
Manganese 0.19 % Mn 0.24 % MnO | |||
Niobium 19.21 % Nb 27.47 % Nb2O5 | |||
Aluminum 0.11 % Al 0.22 % Al2O3 | |||
Zinc 0.11 % Zn 0.14 % ZnO | |||
Iron 0.43 % Fe 0.61 % Fe2O3 | |||
Silicon 18.99 % Si 40.64 % SiO2 | |||
Hydrogen 1.09 % H 9.75 % H2O | |||
Oxygen 45.35 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
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K0.98Na0.62Ca0.37Ba0.07Na0.9Ca0.04Mn2+0.04Zn0.02Nb2.43Ti1.49Fe3+0.09Si7.95Al0.05O24 (OH)2.09O1.91�5.32(H2O) | ||
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Found in peralkaline pegmatites related to agpaitic feldspathoidal syenites as an alteration product of vuonnemite. Labuntsovite group | ||
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Approved IMA 2005 (Dana # Added) | ||
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De-Mix quarry, Mont Saint-Hilaire, Quebec, Canada Link to MinDat.org Location Data. | ||
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Named as the Na-dominant analogue of gjerdingenite-Fe | ||
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IMA2005-030 | ||
Gjerdingenite-Na Image | |||
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Gjerdingenite-Na Crystallography |
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a:b:c =1.0329:1:0.5586 | ||
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a = 14.626, b = 14.16, c = 7.91, Z = 2; beta = 117.43° V = 1,454.02 Den(Calc)= 2.68 | ||
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m | ||
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By Intensity(I/Io): 3.249(1), 3.253(0.61), 7.044(0.54),4.995(0.44), 6.51(0.42), 7.102(0.29), 3.148(0.28), 3.163(0.24), | ||
Physical Properties of Gjerdingenite-Na |
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None | ||
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Colorless, Pale pink. | ||
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2.71 | ||
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Transparent to Opaque | ||
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Brittle - Uneven - Very brittle fracture producing uneven fragments. | ||
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Pseudomorphous - Occurs in the form of another mineral. | ||
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5 - Apatite | ||
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Vitreous (Glassy) | ||
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white | ||
Optical Properties of Gjerdingenite-Na |
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CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2556,KPDmeas= 0.2528,KC= 0.2548 Ncalc = 1.68 - 1.69 |
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Biaxial (+), a=1.647, b=1.653, g=1.755, bire=0.1080, 2V(Calc)=30, 2V(Meas)=25. Dispersion dispersion not observed. | ||
Calculated Properties of Gjerdingenite-Na |
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Bulk Density (Electron Density)=2.62 gm/cc note: Specific Gravity of Gjerdingenite-Na =2.68 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PEGjerdingenite-Na = 33.65 barns/electron U=PEGjerdingenite-Na x relectron= 88.24 barns/cc. |
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GRapi = 46.03 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Gjerdingenite-Na |
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Gjerdingenite-Na Classification |
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60.01.03e.08 (60)Cyclosilicate Four-Membered Rings | ||
(60.01)as Titanosilicates | |||
(60.01.03e)Labuntsovite Group (Labuntsovite subgroup Monoclinic [C2/m]) | |||
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09.CE.30c 09 - SILICATES (Germanates) | ||
09.C - Cyclosilicates | |||
09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe), | |||
Other Gjerdingenite-Na Information |
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NAME( AmMin, v92:1776) PHYS. PROP.(AmMin, v92:1776) OPTIC PROP.(AmMin, v92:1776) | ||
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Links to other databases for Gjerdingenite-Na : 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 Search for Gjerdingenite-Na using: Visit our Advertisers for Gjerdingenite-Na : Ask about Gjerdingenite-Na here : Print or Cut-and-Paste your Gjerdingenite-Na Specimen Label here :
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