[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 Hydroastrophyllite Information(H3O,K)2Ca(Fe+++,Mn)5-6Ti2Si8O26(OH)4F |
Molecular Weight = 1,213.30 gm |
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Potassium 1.61 % K 1.94 % K2O |
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Calcium 3.30 % Ca 4.62 % CaO |
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Titanium 5.52 % Ti 9.22 % TiO2 |
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Manganese 8.15 % Mn 7.60 % MnO / 3.25 % Mn2O3 |
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Niobium 3.06 % Nb 4.38 % Nb2O5 |
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Aluminum 2.22 % Al 4.20 % Al2O3 |
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Iron 16.11 % Fe 23.03 % Fe2O3 |
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Silicon 16.20 % Si 34.66 % SiO2 |
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Hydrogen 0.71 % H 6.31 % H2O |
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Oxygen 41.54 % O |
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Fluorine 1.57 % F 1.57 % F |
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- %
F -0.66 % -O=F2 |
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100.00 % 100.13 % = TOTAL OXIDE |
(H3O)1.5K0.5CaFe3+3.5Mn2+1.3Mn3+0.5Ti1.4Nb0.4Si7AlO26(OH)4F |
Weathering product in an alkalic pegmatite. |
Approved IMA 1974 |
Undefined locality in Sichuan Province, China. Link to MinDat.org Location Data. |
Named for its high water content and relationship to astrophyllite. |
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Hydroastrophyllite Crystallographya:b:c =0.9899:1:0.4524 |
a = 11.86, b = 11.98, c = 5.42, Z = 1; alpha = 103.42°, beta = 95.15°, gamma = 112.2° V = 690.73 Den(Calc)= 2.92 |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 |
By Intensity(I/Io): 3.51(1), 10.55(0.9), 2.643(0.8), |
| Physical Properties of Hydroastrophyllite{???} Good, {???} Good |
Dark brown. |
3.15 |
Translucent to Opaque |
Aggregates - Made of numerous individual crystals or clusters. |
Blocky - Crystal shape tends to be equant (e.g. feldspars). |
3-4 - Calcite-Fluorite |
Vitreous - Adamantine |
yellow white |
| Optical Properties of HydroastrophylliteCI meas= 0.148 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.093 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2374,KPDmeas= 0.2231,KC= 0.2618 Ncalc = 1.77 - 1.82 Biaxial (-), a=1.66, b=1.72, g=1.728, bire=0.0680, 2V(Calc)=38, 2V(Meas)=40. |
bright yellow. |
orange yellow. |
dull yellow. |
| Calculated Properties of HydroastrophylliteBulk Density (Electron Density)=2.89 gm/cc |
note: Specific Gravity of Hydroastrophyllite =2.96 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEHydroastrophyllite = 13.49 barns/electron |
U=PEHydroastrophyllite x relectron= 39.03 barns/cc. |
GRapi = 22.72 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Hydroastrophyllite | Hydroastrophyllite Classification69.01.01.06 (69)Inosilicate Chains with Side Branches or Loops |
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(69.01)with (P=2, and N=4, 2 branches) |
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(69.01.01)Astrophyllite group |
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09.DC.05 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DC -Inosilicates with branched 2-periodic single chains Si2O6 + 2SiO3 ® Si4O12 |
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| Other Hydroastrophyllite InformationNAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) |
Links to other databases for Hydroastrophyllite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Hydroastrophyllite using: Visit our Advertisers for Hydroastrophyllite : 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 Hydroastrophyllite Mineral Data : Ask about Hydroastrophyllite here : Print or Cut-and-Paste your Hydroastrophyllite Specimen Label here :
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