Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (13 online) Mindat Auctions

Gillespite

Big Photo

El Rosario, Mun. de Ensenada, Baja California Norte, Mexico
© Elmar Lackner

Show Gillespite Photos (4)
Formula:
BaFe
2+
 
[Si
 
4
O
 
10
]
System:TetragonalHardness:4
This page provides mineralogical data about Gillespite.

Classification of Gillespite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/H.02-40
Nickel-Strunz 10th (pending) edition ID:9.EA.05

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
Dana 8th edition ID:71.2.3.2

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
2 : Sheets of 6-membered rings with 2:1 layers
Hey's CIM Ref.:14.7.7

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
mindat.org URL:http://www.mindat.org/min-1693.html
Please feel free to link to this page.

Type Occurrence of Gillespite

Type Locality:Dry Delta, Alaska Range, Yukon-Koyukuk Borough, Alaska, USA
Year of Discovery:1922

Physical Properties of Gillespite

Hardness (Mohs):4

Crystallography of Gillespite

Crystal System:Tetragonal
Cell Parameters:a = 7.49Å, c = 16.05Å
Ratio:a:c = 1 : 2.143
Unit Cell Volume:V 900.41 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Gillespite

Type:Uniaxial (-)
RI values: nω = 1.621 nε = 1.619
Maximum Birefringence:δ = 0.002

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Gillespite

Formula:
BaFe
2+
 
[Si
 
4
O
 
10
]
Essential elements:Ba, Fe, O, Si
All elements listed in formula:Ba, Fe, O, Si
Common Impurities:Al,Mn

Relationship of Gillespite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
[(F,OH)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
[(OH,F)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
[F|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
·3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
]·3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
·2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.60Penkvilksite
(Na,Ca)
 
4
(Ti,Zr)
 
2
Si
 
8
O
 
22
·5H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
)·2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
[(OH)
 
6
|AlSi
 
9
O
 
24
] · 3H
 
2
O
9.EA.75Zeravshanite
Cs
 
4
Na
 
2
Zr
 
3
[Si
 
18
O
 
45
](H
 
2
O)
 
2
Related Minerals - Hey's Index Grouping:

- +
14.7.1Sanbornite
Ba
 
2
[Si
 
4
O
 
10
]
14.7.2Krauskopfite
BaSi
 
2
O
 
5
·3H
 
2
O
14.7.3Walstromite
BaCa
 
2
[Si
 
3
O
 
9
]
14.7.4Macdonaldite
BaCa
 
4
Si
 
16
O
 
36
(OH)
 
2
·10H
 
2
O
14.7.5Ericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.6Orthoericssonite
BaMn
2+
2
Fe
3+
 
[O|OH|Si
 
2
O
 
7
]
14.7.8Andrémeyerite
BaFe
2+
2
[Si
 
2
O
 
7
]
14.7.9Pellyite
Ba
 
2
Ca(Fe,Mg)
 
2
Si
 
6
O
 
17
14.7.10Taikanite
Sr
 
3
BaMn
2+
2
[O|Si
 
2
O
 
6
]
 
2
14.7.11Willemite
Zn
 
2
[SiO
 
4
]
14.7.12Hemimorphite
Zn
 
4
[(OH)
 
2
|Si
 
2
O
 
7
] · H
 
2
O
14.7.13Zincsilite
Zn
 
3
Si
 
4
O
 
10
(OH)
 
2
·4H
 
2
O
14.7.14Hardystonite
Ca
 
2
Zn[Si
 
2
O
 
7
]
14.7.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
14.7.16Clinohedrite
CaZn[SiO
 
4
] · H
 
2
O
14.7.17Junitoite
CaZn
 
2
[Si
 
2
O
 
7
] · H
 
2
O
14.7.18Larsenite
PbZn[SiO
 
4
]
14.7.19Esperite
PbCa
 
3
Zn
 
4
[SiO
 
4
]
 
4
14.7.20Hodgkinsonite
Mn
2+
 
Zn
 
2
[(OH)
 
2
|SiO
 
4
]
14.7.21Gerstmannite
(Mg,Mn
2+
 
)Zn[(OH)
 
2
|SiO
 
4
]
14.7.22Gageite
Mn
 
21
O
 
3
(Si
 
4
O
 
12
)
 
2
(OH)
 
20
14.7.23Franklinfurnaceite
Ca
 
2
FeMn
 
3
MnZn
 
2
Si
 
2
O
 
10
(OH)
 
8

Other Names for Gillespite

Other Languages:
German:Gillespit
Russian:Джиллеспит
Spanish:Gillespita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Gillespite

Reference List:American Mineralogist: 14: 319-322.

Pabst, Adolf (1942), The unit cell and space group of gillespite: Am. Min.: 28: 372-390; …(abstract): American Mineralogist: 26: 199 (1941).

Pabst, Adolf (1958), The structure of leached gillespite: American Mineralogist: 43: 970-980.

Hazen, R.M. & C.W. Burnham (1974), The crystal structure of gillespite I and II: a structure determination at high pressure: American Mineralogist: 59: 1166-1174.

Hazen, R.M. (1977), Mechanisms of transformation and twinning in gillespite at high pressure: American Mineralogist: 62: 528-533.

Articles/Blogs about Gillespite

Internet Links for Gillespite

Search Engines:
  • Look for Gillespite on Google
  • Look for Gillespite images on Google
    • External Links:
  • Look for Gillespite on Webmineral
  • Look for Gillespite on Athena Mineralogy
  • Look for Gillespite on Wikipedia
  • Look for Gillespite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Gillespite in the Natural History Museum (London) online catalogue
  • Gillespite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Buy fine minerals and gemstones from Pala International
  • Wendel Minerals - Auktion & Shop
  • Find Gillespite on www.crystalclassics.co.uk
  • The Arkenstone - Fine Minerals
  • Buy Fine Minerals from mineralsweb.com
  • High-end worldwide specimens & outstanding customer service
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Search for - Gillespite - on e-Rocks Mineral Sales & Auctions
  • Fine Minerals from Dan Weinrich Minerals
  • Buy minerals from Mineralium.com
  • Buy Minerals and Crystals from Crystalarium.com
  • Search for Gillespite on minvision.com
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Gillespite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    These maps work faster with Firefox!
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Yukon Territory
      • Watson Lake Mining District
        • Itsy Mts.
          • MacMillian Pass
    Mexico
     
    • Baja California Norte
      • Mun. de Ensenada
    No reference listed
      • Tres Pozos
    USA
     
    • Alaska
      • Yukon-Koyukuk Borough
        • Alaska Range
    		J.Washington Acad.Sci.(1922) 12, 7-8
    • California
      • Fresno Co.
        • Big Creek
    		[MinRec 33:161]
    Bob Walstrom, p.c.
        • Rush Creek
      • Mariposa Co.
        • Incline
    		[MinRec 30:414]
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.