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Hydroastrophyllite Mineral Data

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General Hydroastrophyllite Information

Help on Chemical  Formula: Chemical Formula: (H3O,K)2Ca(Fe+++,Mn)5-6Ti2Si8O26(OH)4F
Help on Composition: Composition: Molecular Weight = 1,213.30 gm
   Potassium   1.61 %  K     1.94 % K2O
   Calcium     3.30 %  Ca    4.62 % CaO
   Titanium    5.52 %  Ti    9.22 % TiO2
   Manganese   8.15 %  Mn    7.60 % MnO /  3.25 % Mn2O3
   Niobium     3.06 %  Nb    4.38 % Nb2O5
   Aluminum    2.22 %  Al    4.20 % Al2O3
   Iron       16.11 %  Fe   23.03 % Fe2O3
   Silicon    16.20 %  Si   34.66 % SiO2
   Hydrogen    0.71 %  H     6.31 % H2O
   Oxygen     41.54 %  O
   Fluorine    1.57 %  F     1.57 % F
                -   %   F    -0.66 % -O=F2    
             ______        ______ 
             100.00 %      100.13 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (H3O)1.5K0.5CaFe3+3.5Mn2+1.3Mn3+0.5Ti1.4Nb0.4Si7AlO26(OH)4F
Help on Environment: Environment: Weathering product in an alkalic pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Undefined locality in Sichuan Province, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its high water content and relationship to astrophyllite.

Hydroastrophyllite Image

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Comments: Spray of brown hydroastrophyllite in alkaline granite pegmatite matrix.
Location: Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 12x9 mm.
© Pavel M. Kartashov

Hydroastrophyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9899:1:0.4524
Help on Cell Dimensions: Cell Dimensions: 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
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.51(1), 10.55(0.9), 2.643(0.8),

Physical Properties of Hydroastrophyllite

Help on Cleavage: Cleavage: {???} Good, {???} Good
Help on Color: Color: Dark brown.
Help on Density: Density: 3.15
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Blocky - Crystal shape tends to be equant (e.g. feldspars).
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: yellow white

Optical Properties of Hydroastrophyllite

Help on Gladstone-Dale: Gladstone-Dale: CI 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
Help on Optical Data: Optical Data: Biaxial (-), a=1.66, b=1.72, g=1.728, bire=0.0680, 2V(Calc)=38, 2V(Meas)=40.
Help on Pleochroism (x): Pleochroism (x): bright yellow.
Help on Pleochroism (y): Pleochroism (y): orange yellow.
Help on Pleochroism (z): Pleochroism (z): dull yellow.

Calculated Properties of Hydroastrophyllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Hydroastrophyllite =2.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHydroastrophyllite = 13.49 barns/electron
U=PEHydroastrophyllite x relectron= 39.03 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 22.72 (Gamma Ray American Petroleum Institute Units)
Concentration of Hydroastrophyllite per GRapi unit = 4.40 (%)

Estimated Radioactivity from Hydroastrophyllite - barely detectable


Hydroastrophyllite Classification

Help on  Dana Class: Dana Class: (69)Inosilicate Chains with Side Branches or Loops
  (69.01)with (P=2, and N=4, 2 branches)
  (69.01.01)Astrophyllite group Astrophyllite K2Na(Fe,Mn)7Ti2Si8O26(OH)4 P1 1 Kupletskite K2Na(Mn,Fe)7(Ti,Nb)2Si8O26(OH)4F C 2/c 2/m Kupletskite-(Cs) (Cs,K)2Na(Mn,Fe,Li)7(Ti,Nb)2Si8O26(OH)4F P1 1 Niobophyllite K2Na(Fe,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O) P1,P 1 Tri Zircophyllite K2(Na,Ca)(Mn,Fe)7(Zr,Nb)2Si8O26(OH)4F P1 1 Hydroastrophyllite (H3O,K)2Ca(Fe,Mn)5-6Ti2Si8O26(OH)4F P1 1 Magnesioastrophyllite K2Na[Na(Fe,Fe,Mn)Mg2]Ti2Si8O26(OH)4F A2/m 2/m Niobokupletskite! K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F) P1 1 Nalivkinite! Li2NaFe7Ti2Si8O24(OH)4F P1 1
Help on  Strunz Class: Strunz Class: 09.DC.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DC -Inosilicates with branched 2-periodic single chains Si2O6 + 2SiO3 � Si4O12
09.DC.05 Astrophyllite K2Na(Fe,Mn)7Ti2Si8O26(OH)4 P1 1
09.DC.05 Kupletskite-(Cs) (Cs,K)2Na(Mn,Fe,Li)7(Ti,Nb)2Si8O26(OH)4F P1 1
09.DC.05 Kupletskite K2Na(Mn,Fe)7(Ti,Nb)2Si8O26(OH)4F C 2/c 2/m
09.DC.05 Magnesioastrophyllite K2Na[Na(Fe,Fe,Mn)Mg2]Ti2Si8O26(OH)4F A2/m 2/m
09.DC.05 Hydroastrophyllite (H3O,K)2Ca(Fe,Mn)5-6Ti2Si8O26(OH)4F P1 1
09.DC.05 Niobophyllite K2Na(Fe,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O) P1,P 1 Tri
09.DC.05 Nalivkinite! Li2NaFe7Ti2Si8O24(OH)4F P1 1
09.DC.05 Zircophyllite K2(Na,Ca)(Mn,Fe)7(Zr,Nb)2Si8O26(OH)4F P1 1
09.DC.05 Niobokupletskite! K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F) P1 1

Other Hydroastrophyllite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Hydroastrophyllite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.DC.05





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