[On-Line Catalogue] [On-Line Auctions] [eBay] [Contact Us] [Policies] We specialize in fine European and Asian Mineral Specimens Heliodor is based in Prague, Czech Republic General Ashcroftine-(Y) InformationK5Na5(Y,Ca)12Si28O70(OH)2(CO3)8•8(H2O) |
Molecular Weight = 3,810.20 gm |
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Potassium 5.13 % K 6.18 % K2O |
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Sodium 3.02 % Na 4.07 % Na2O |
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Calcium 2.10 % Ca 2.94 % CaO |
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Yttrium 23.33 % Y 29.63 % Y2O3 |
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Silicon 20.64 % Si 44.15 % SiO2 |
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Hydrogen 0.42 % H 3.78 % H2O |
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Carbon 2.52 % C 9.24 % CO2 |
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Oxygen 42.83 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
K5Na5Y10Ca2Si28O70(CO3)8•8(H2O) |
In nepheline syenites. |
Valid Species (Pre-IMA) 1933 |
From Narssarssuk, Greenland. Link to MinDat.org Location Data. |
Named for Frederick Noel Ashcroft (1878-1949), benefactor to the British Museum (Natural History), London, England. |
Ashcroftine-(Y) + Pronunciation |
ICSD 202506 |
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PDF 22-508 |
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| | Ashcroftine-(Y) Crystallographya:c = 1:0.72984 |
a = 23.994, c = 17.512, Z = 4; V = 10,081.87 Den(Calc)= 2.51 |
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm |
By Intensity(I/Io): 17.1(1), 12.043(0.8), 7.615(0.6),2.687(0.5), 3.114(0.5), 5.379(0.35), 6.014(0.3), |
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Mouse
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| Physical Properties of Ashcroftine-(Y){100} Perfect, {001} Distinct |
Light violet, Pink, Pinkish brown, Deep violet. |
2.61 |
Transparent to Translucent |
Flexible - Flexible fragments. |
Fibrous - Crystals made up of fibers. |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
5 - Apatite |
Vitreous - Silky |
white |
| Optical Properties of Ashcroftine-(Y)CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.076 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2158,KPDmeas= 0.2076,KC= 0.2006 Ncalc = 1.5 - 1.52 Uniaxial (+), w=1.536-1.537, e=1.545-1.549, bire=0.0090-0.0120. |
| Calculated Properties of Ashcroftine-(Y)Bulk Density (Electron Density)=2.54 gm/cc |
note: Specific Gravity of Ashcroftine-(Y) =2.61 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEAshcroftine-(Y) = 29.86 barns/electron |
U=PEAshcroftine-(Y) x relectron= 75.75 barns/cc. |
GRapi = 71.98 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Ashcroftine-(Y) | Ashcroftine-(Y) Classification70.03.01.01 (70)Inosilicate Column or Tube Structures |
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(70.03)with balo-silicates |
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(70.03.01)Dana Group |
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09.DN.15 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DN -Inosilicates with 6-periodic double chains |
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| Other Ashcroftine-(Y) InformationNAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
Links to other databases for Ashcroftine-(Y) : |
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 - Am. Min. Crystal Structure Database 4 - Athena 5 - EUROmin Project 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Ashcroftine-(Y) using: Visit our Advertisers for Ashcroftine-(Y) : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Ashcroftine-(Y) Mineral Data : Ask about Ashcroftine-(Y) here : Print or Cut-and-Paste your Ashcroftine-(Y) Specimen Label here :
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