Goosecreekite
A valid IMA mineral species
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About Goosecreekite
Formula:
Ca[Al2Si6O16] · 5H2O
Colour:
Colorless, white
Lustre:
Vitreous, Pearly
Hardness:
4½
Specific Gravity:
2.21
Crystal System:
Monoclinic
Member of:
Name:
After the type locality, the New Goose Creek Quarry (Luck Company Quarry), Leesburg, Loudoun Co., Virginia, USA.
Unique Identifiers
Mindat ID:
1726
Long-form identifier:
mindat:1:1:1726:4
IMA Classification of Goosecreekite
Approved
IMA Formula:
Ca(Si6Al2)O16·5H2O
First published:
1980
Classification of Goosecreekite
9.GB.25
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
B : Chains of single connected 4-membered rings
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
B : Chains of single connected 4-membered rings
77.1.7.3
77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
16.9.27
16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca
16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Gck | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Goosecreekite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Goosecreekite
Vitreous, Pearly
Transparency:
Transparent
Comment:
Vitreous to pearly on crystal faces
Colour:
Colorless, white
Streak:
White
Hardness:
4½ on Mohs scale
Cleavage:
Perfect
Parallel to {010}
Parallel to {010}
Density:
2.21(2) g/cm3 (Measured) 2.23 g/cm3 (Calculated)
Optical Data of Goosecreekite
Type:
Biaxial (-)
RI values:
nα = 1.495(2) nβ = 1.498(2) nγ = 1.502(2)
2V:
Measured: 82° (5)
Max. Birefringence:
δ = 0.007
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate (negative)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
relatively weak (type description says not discernable)
Chemistry of Goosecreekite
Mindat Formula:
Ca[Al2Si6O16] · 5H2O
Element Weights:
Crystallography of Goosecreekite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Setting:
P21
Cell Parameters:
a = 7.401(3) Å, b = 17.439(36) Å, c = 7.293(3) Å
β = 105.44°
β = 105.44°
Ratio:
a:b:c = 0.424 : 1 : 0.418
Unit Cell V:
907.31 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0001062 | Goosecreekite | Rouse R C, Peacor D R (1986) Crystal structure of the zeolite mineral goosecreekite, CaAl2Si6O16.5H2O American Mineralogist 71 1494-1501 |  | 1986 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.467 Å | (100) |
| 3.309 Å | (71) |
| 4.848 Å | (70) |
| 4.505 Å | (69) |
| 3.046 Å | (51) |
| 3.254 Å | (43) |
| 7.003 Å | (42) |
| 5.538 Å | (39) |
| 3.005 Å | (38) |
| 7.147 Å | (37) |
| 3.117 Å | (32) |
| 4.110 Å | (31) |
| 3.126 Å | (30) |
| 3.505 Å | (29) |
| 5.452 Å | (26) |
| 3.325 Å | (26) |
| 2.9024 Å | (26) |
| 3.477 Å | (25) |
| 2.6886 Å | (25) |
Comments:
Raade and Berg (2002), from Juvvatn, Norway
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) |
Type Occurrence of Goosecreekite
General Appearance of Type Material:
Polycrystalline aggregates and as imperfect single crystals up to 2.0 mm in diameter
Place of Conservation of Type Material:
Type material in the Smithsonian Institution catalog no. 14588.
Holotype samples are preserved in the Royal Ontario Museum in Toronto, the American Museum of Natural History, the British Museum (N.H.) and the Mineralogical Museum at Harvard University.
Holotype samples are preserved in the Royal Ontario Museum in Toronto, the American Museum of Natural History, the British Museum (N.H.) and the Mineralogical Museum at Harvard University.
Geological Setting of Type Material:
Triassic diabase
Other Language Names for Goosecreekite
Relationship of Goosecreekite to other Species
Member of:
Other Members of Zeolite Group:
| Alflarsenite | NaCa2Be3Si4O13(OH) · 2H2O | Mon. 2 : P21 |
| Amicite | K2Na2Al4Si4O16 · 5H2O | Mon. 2 |
| Ammonioleucite | (NH4)(AlSi2O6) | Tet. 4/m : I41/a |
| Analcime | Na(AlSi2O6) · H2O | Tric. 1 : P1 |
| Arzamastsevite | K6Al5Si6O20(OH)4Cl | Tet. 42m : I42m |
| Bellbergite | (K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O | Hex. |
| Bikitaite | LiAlSi2O6 · H2O | Tric. 1 : P1 |
| Boggsite | Ca8Na3(Si,Al)96O192 · 70H2O | Orth. mmm(2/m2/m2/m) : Imma |
| Brewsterite Subgroup | Zeolite Group. | |
| Chabazite-Levyne Subgroup | M[Al2Si4O12] · 6H2O | |
| Chiavennite | CaMnBe2Si5O13(OH)2 · 2H2O | Mon. 2/m : P21/b |
| Clinoptilolite Subgroup | (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O | |
| Cowlesite | CaAl2Si3O10 · 6H2O | Orth. mmm(2/m2/m2/m) |
| Dachiardite Subgroup | Zeolite Group. | |
| Direnzoite | NaK6MgCa2(Al13Si47O120) · 36H2O | Orth. mmm(2/m2/m2/m) : Pmmn |
| Edingtonite | Ba[Al2Si3O10] · 4H2O | Orth. 222 : P212121 |
| Epistilbite | CaAl2Si6O16 · 5H2O | Mon. |
| Erionite Subgroup | M2[Al4Si14O36] · 15H2O | |
| Fabrièsite | Na3Al3Si3O12 · 2H2O | Orth. mm2 : Pmm2 |
| Faujasite Subgroup | M3.5[Al7Si17O48] · 32H2O | |
| Ferrierite Subgroup | Name used for unanalysed specimens that could be either ferrierite-K, ferrierite-Mg, ... | |
| Ferrochiavennite | Ca1-2Fe[(Si,Al,Be)5Be2O13(OH)2] · 2H2O | Mon. 2/m : P21/b |
| Flörkeite | (K3Ca2Na)[Al8Si8O32] · 12H2O | Tric. 1 : P1 |
| Garronite Subgroup | ||
| Gaultite | Na4Zn2Si7O18 · 5H2O | Orth. mm2 : Fdd2 |
| Gismondine Subgroup | Zeolite Group. | |
| Gmelinite Subgroup | In 1997, gmelinite was split into Gmelinite-Ca, Gmelinite-Na and Gmelinite-K. | |
| Gobbinsite | Na5(Si11Al5)O32 · 11H2O | Orth. mmm(2/m2/m2/m) : Pnma |
| Gottardiite | Na3Mg3Ca5Al19Si117O272 · 93H2O | Orth. mmm(2/m2/m2/m) : Cmca |
| Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O | |
| Hsianghualite | Ca3Li2(Be3Si3O12)F2 | Iso. 23 : I213 |
| Kalborsite | K6Al4BSi6O20(OH)4Cl | Tet. 42m : P421c |
| Kirchhoffite | Cs(BSi2O6) | Tet. 4/mmm(4/m2/m2/m) : I41/acd |
| Laumontite | CaAl2Si4O12 · 4H2O | Mon. 2/m : B2/m |
| Leucite | K(AlSi2O6) | Tet. 4/m : I41/a |
| Limousinite | BaCa[Be4P4O16] · 6H2O | Mon. 2/m : P21/b |
| Lithosite | K6Al4Si8O25 · 2H2O | Mon. |
| Loomisite | Ba[Be2P2O8] · H2O | Mon. m |
| Lovdarite | K2Na6Be4Si14O36 · 9H2O | Orth. mm2 |
| Maricopaite | Pb7Ca2(Si,Al)48O100 · 32H2O | Orth. |
| Martinandresite | Ba2(Al4Si12O32) · 10H2O | Orth. mmm(2/m2/m2/m) : Pmmn |
| Mazzite Subgroup | Zeolite Group. | |
| Meierite | Ba44Si66Al30O192Cl25(OH)33 | Iso. m3m(4/m32/m) : Im3m |
| Merlinoite | K5Ca2(Si23Al9)O64 · 24H2O | Orth. mmm(2/m2/m2/m) : Immm |
| Montesommaite | (K,Na)9Al9Si23O64 · 10H2O | Orth. mm2 : Fdd2 |
| Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O | Orth. |
| Mountainite | KNa2Ca2[Si8O19(OH)] · 6H2O | Mon. 2/m : P2/b |
| Mutinaite | Na3Ca4Si85Al11O192 · 60H2O | Orth. mmm(2/m2/m2/m) : Pnma |
| Nabesite | Na2BeSi4O10 · 4H2O | Orth. 222 : P212121 |
| Natrolite Subgroup | A subgroup of the Zeolite Group. | |
| Offretite | KCaMg(Si13Al5)O36 · 15H2O | Hex. 6m2 : P6m2 |
| Pahasapaite | Li8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O | Iso. 23 : I23 |
| Parthéite | Ca2(Si4Al4) O15 (OH)2 · 4H2O | Mon. 2/m : B2/b |
| Paulingite Subgroup | Paulingite was originally described in 1960. | |
| Perlialite | K9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O | Hex. 6/mmm(6/m2/m2/m) : P6/mmm |
| Phillipsite Subgroup | (Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O | |
| Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O | Iso. m3m(4/m32/m) : Ia3d |
| Roggianite | Ca2Be(OH)2Al2Si4O13 · 2.5H2O | Tet. 4/mmm(4/m2/m2/m) : I4/mcm |
| Rongibbsite | Pb2(Si4Al)O11(OH) | Mon. 2/m : B2/m |
| Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O | |
| Terranovaite | (Na,Ca)8(Si68Al12)O160 · 29H2O | Orth. |
| Thomsonite Subgroup | The large majority of "thomsonite" is thomsonite-Ca. | |
| Thornasite | Na12Th4+3(Si8O19)4 · 18H2O | Trig. 3m : R3m |
| Tschernichite | (Ca,Na2)[Al2Si4O12] · 4-8H2O | Tet. 4/mmm(4/m2/m2/m) : P4/mmm |
| Tschörtnerite | Ca4(Ca,Sr,K,Ba)3Cu3[Al3Si3O12]4(OH)8 · nH2O | Iso. m3m(4/m32/m) : Fm3m |
| 'UM1996-38-SiO:AlCaHNa' | Na-Ca-Al-Si-O-H | |
| 'UM1999-33-SiO:AlHKNa' | K7Na5Al12Si20O64 · 24H2O | |
| 'UM2002-40-SiO:AlCaHKMgNa' | (Mg,Ca,Na,K)7.5(Al12.8Si51.2)O128 · 65H2O | Tet. 422 : P4122 |
| 'Unnamed (Ca analogue of Merlinoite)' | (Ca,K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O ? | |
| Wairakite | Ca(Al2Si4O12) · 2H2O | Mon. 2/m : B2/m |
| Weinebeneite | CaBe3(PO4)2(OH)2 · 4H2O | Mon. m : Bb |
| Wenkite | (Ba,K)4(Ca,Na)6[(Si,Al)20O39(OH)2](SO4)3 · 0.5H2O | Hex. 6m2 : P62m |
| Wilancookite | (Ba5Li2◻)Ba6Be24P24O96 · 26H2O | Iso. 23 : I23 |
| Willhendersonite | KCa[Al3Si3O12] · 5H2O | Tric. 1 : P1 |
| Yugawaralite | CaAl2Si6O16 · 4H2O | Mon. m : Pb |
Common Associates
Associations Based on Photo Data:
| 73 photos of Goosecreekite associated with Quartz | SiO2 |
| 29 photos of Goosecreekite associated with Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| 16 photos of Goosecreekite associated with Stilbite-Ca | NaCa4(Si27Al9)O72 · 28H2O |
| 13 photos of Goosecreekite associated with Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
| 11 photos of Goosecreekite associated with Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| 10 photos of Goosecreekite associated with 'Amethyst' | SiO2 |
| 10 photos of Goosecreekite associated with Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| 8 photos of Goosecreekite associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 6 photos of Goosecreekite associated with Prehnite | Ca2Al2Si3O10(OH)2 |
| 3 photos of Goosecreekite associated with Celadonite | K(MgFe3+◻)(Si4O10)(OH)2 |
Related Minerals - Strunz-mindat Grouping
| 9.GB.05 | Fabrièsite | Na3Al3Si3O12 · 2H2O |
| 9.GB.05 | Lithosite | K6Al4Si8O25 · 2H2O |
| 9.GB.05 | Wairakite | Ca(Al2Si4O12) · 2H2O |
| 9.GB.05 | Kirchhoffite | Cs(BSi2O6) |
| 9.GB.05 | Hsianghualite | Ca3Li2(Be3Si3O12)F2 |
| 9.GB.05 | Leucite | K(AlSi2O6) |
| 9.GB.05 | Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| 9.GB.05 | Ammonioleucite | (NH4)(AlSi2O6) |
| 9.GB.05 | Analcime | Na(AlSi2O6) · H2O |
| 9.GB.10 | Laumontite | CaAl2Si4O12 · 4H2O |
| 9.GB.15 | Yugawaralite | CaAl2Si6O16 · 4H2O |
| 9.GB.20 | Roggianite | Ca2Be(OH)2Al2Si4O13 · 2.5H2O |
| 9.GB.30 | Montesommaite | (K,Na)9Al9Si23O64 · 10H2O |
| 9.GB.35 | Parthéite | Ca2(Si4Al4) O15 (OH)2 · 4H2O |
Fluorescence of Goosecreekite
None observed
Other Information
Notes:
Goosecreekite is insoluble in 1:1 HCl or HNO3 with a one-hour immersion time.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Goosecreekite
mindat.org URL:
https://www.mindat.org/min-1726.html
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References for Goosecreekite
Reference List:
Dunn, P. J., Peacor, D. R., Newberry, N., Ramik, R. A. (1980) Goosecreekite, a new calcium aluminum silicate hydrate, possibly related to brewsterite and epistilbite. The Canadian Mineralogist, 18 (3) 323-327
Fleischer, Michael, Cabri, Louis J. (1981) New Mineral Names. American Mineralogist, 66 (11-12) 1274-1280
Artioli, G., Smith, J. V., Kvick, Å. (1985) Multiple hydrogen positions in the zeolite brewsterite, (Sr0.95,Ba0.05)Al2Si6O16.5H2O. Acta Crystallographica Section C Crystal Structure Communications, 41 (4). 492-497 doi:10.1107/s0108270185004401
Coombs, Douglas S., Alberti, Alberto, Armbruster, Thomas, Artioli, Gilberto, Colella, Carmine, Galli, Ermanno, Grice, Joel D., Liebau, Friedrich, Mandarino, Joseph A., Minato, Hideo, et al. (1997) Recommended nomenclature for zeolite minerals; report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (6). 1571-1606
Raade, Gunnar, Berg, Hans-Jørgen (2002) Powder X-ray diffraction data for goosecreekite [CaAl2Si6O16⋅5H2O]. Powder Diffraction, 17 (3) 247-249 doi:10.1154/1.1469024
Gerrard, L.A., Henry, P.F., Weller, M.T., Ahmed, A. (2004) Structure and ion exchange properties of the natural zeolites edingtonite and goosecreekite. Studies in Surface Science and Catalysis, 154 (B). 1341-1348 doi:10.1016/s0167-2991(04)80647-5
Kol’tsova, T. N. (2007) Crystal structures of zeolites with the general formula CaAl2Si6O16·nH2O. Inorganic Materials, 43 (6) 651-659 doi:10.1134/s0020168507060180
Rabdel Ruiz-Salvador, A., Almora-Barrios, Neyvis, Gómez, Ariel, Lewis, Dewi W. (2007) Interplay of water, extra-framework cations and framework atoms in the structure of low-silica zeolites: the case of the natural zeolite Goosecreekite as studied by computer simulation. Phys. Chem. Chem. Phys., 9 (4). 521-532 doi:10.1039/b607030b
Localities for Goosecreekite
Showing 16 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Costa Rica | |
| Zeledón (2004) |
Germany | |
| Hampel et al. (1990) +1 other reference |
Hungary | |
| MOL (hungarian oil company) |
India | |
| Lavinsky (n.d.) |
| |
| |
| Claeys (2009) |
| From specimens collected in the ... | |
| P. Nicholson Collection |
| Ottens (2011) |
| Ottens (2003) |
| Ottens et al. (2019) | |
Norway | |
| Nordrum (2002) +1 other reference |
USA | |
| Gaines et al. (1997) +1 other reference |
| Rocks & Min.:60:167. +2 other references |
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Jalgaon District, Nashik Division, Maharashtra, India