Mineralogy Database

Goosecreekite Mineral Data

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General Goosecreekite Information

Help on Chemical  Formula: Chemical Formula: CaAl2Si6O16•5(H2O)
Help on Composition: Composition: Molecular Weight = 608.62 gm
   Calcium    6.59 %  Ca    9.21 % CaO
   Aluminum   8.87 %  Al   16.75 % Al2O3
   Silicon   27.69 %  Si   59.23 % SiO2
   Hydrogen   1.66 %  H    14.80 % H2O
   Oxygen    55.20 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2Si6O16•5(H2O)
Help on Environment: Environment: A late-stage mineral in vugs and fractures in a Triassic diabase.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: In the Goose Creek quarry, Leesburg, Loudoun County, Virginia, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Goosecreekite + Pronunciation Say GOOSECREEKITE
Help on Synonym: Synonym: ICSD 202114
  PDF 35-469

Goosecreekite Image

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Comments: Large cluster of many rosettes of white goosecreekite.
Location: Jalgaon, Maharashtra, India. Scale: 15x14x7 cm.
© John Betts - Fine Minerals

Goosecreekite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4243:1:0.4182
Help on Cell Dimensions: Cell Dimensions: a = 7.401, b = 17.439, c = 7.293, Z = 2; beta = 105.44° V = 907.31 Den(Calc)= 2.23
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.53(1), 5.59(0.5), 7.19(0.5),

Physical Properties of Goosecreekite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.21
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Goosecreekite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2235,KPDmeas= 0.2255,KC= 0.2276
Ncalc = 1.5 - 1.51
Help on Optical Data: Optical Data: Biaxial (-), a=1.495, b=1.498, g=1.502, bire=0.0070

Calculated Properties of Goosecreekite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.24 gm/cc
note: Specific Gravity of Goosecreekite =2.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGoosecreekite = 2.15 barns/electron
U=PEGoosecreekite x rElectron Density= 4.82 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Goosecreekite is Not Radioactive

Goosecreekite Classification

Help on  Dana Class: Dana Class: (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.07)Brewsterite and related species Brewsterite-Sr (Sr,Ba)Al4Si12O32•10(H2O) P 21/m 2/m Brewsterite-Ba! (Ba,Sr)Al2Si6O16•5(H2O) P 21/m,P 21 Mono Yugawaralite CaAl2Si6O16•4(H2O) Pc m Goosecreekite CaAl2Si6O16•5(H2O) P 21 2 Roggianite Ca2[Be(OH)2Al2Si4O13]•<2•5(H2O) I 4/mcm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.GB.25 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GB -Chains of single connected 4-membered rings
09.GB.25 Goosecreekite CaAl2Si6O16•5(H2O) P 21 2

Other Goosecreekite Information

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

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Dana No: Strunz No: 09.GB.25





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