Mindat Logo

Stillwellite-(Ce)

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



Formula:
(Ce,La,Ca)BSiO
 
5
Colour:Pale violet-gray, light ...
Name:Named after Frank Leslie Stillwell (1888-1963), Australian ore mineralogist.
This page provides mineralogical data about Stillwellite-(Ce).

Classification of Stillwellite-(Ce)

IMA status:Approved
Strunz 8th edition ID:8/E.05-20
Nickel-Strunz 10th (pending) edition ID:9.AJ.25

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
Dana 8th edition ID:54.2.3.2

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination
Hey's CIM Ref.:17.5.18

17 : Silicates Containing other Anions
5 : Borosilicates
mindat.org URL:http://www.mindat.org/min-3788.html
Please feel free to link to this page.

Type Occurrence of Stillwellite-(Ce)

Type Locality:Mary Kathleen Mine, Mary Kathleen district, Mount Isa - Cloncurry area, Queensland, Australia

Physical Properties of Stillwellite-(Ce)

Lustre:Vitreous, Greasy
Diaphaneity (Transparency):Translucent
Colour:Pale violet-gray, light pink, brownish yellow, orange

Optical Data of Stillwellite-(Ce)

Type:Uniaxial (+)
RI values: nω = 1.765 nε = 1.780
Maximum Birefringence:δ = 0.015

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

Chemical Properties of Stillwellite-(Ce)

Formula:
(Ce,La,Ca)BSiO
 
5
Simplified for copy/paste:(Ce,La,Ca)BSiO5
Essential elements:B, Ce, O, Si
All elements listed in formula:B, Ca, Ce, La, O, Si

Relationship of Stillwellite-(Ce) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.AJ.05Grandidierite
(Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
9.AJ.05Ominelite
(Fe
2+
 
,Mg)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
9.AJ.10Dumortierite
(Al,Fe
3+
 
)
 
7
(SiO
 
4
)
 
3
(BO
 
3
)O
 
3
9.AJ.10Holtite
(Ta
 
0.6
 
0.4
)Al
 
6
BSi
 
3
O
 
18
(O,OH)
 
2.25
9.AJ.10Magnesiodumortierite
(Mg,Ti,◻(Al,Mg)
 
2
Al
 
4
Si
 
3
O
 
18-y
(OH)
 
y
B y = 2-3
9.AJ.15Garrelsite
Ba
 
3
NaSi
 
2
B
 
7
O
 
16
(OH)
 
4
9.AJ.20Bakerite
Ca
 
4
(H
 
5
B
 
5
Si
 
3
O
 
20
)
9.AJ.20Datolite
Ca(HBSiO
 
5
)
9.AJ.20Gadolinite-(Ce)
(Ce,La,Nd,Y)
 
2
Fe
2+
 
Be
 
2
Si
 
2
O
 
10
9.AJ.20Gadolinite-(Y)
Y
 
2
Fe
2+
 
Be
 
2
Si
 
2
O
 
10
9.AJ.20Hingganite-(Ce)
(Ce,REE)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Y)
(Y,REE,Ca)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Yb)
(Yb,Y,REE)
 
2
□Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Homilite
Ca
 
2
(Fe
2+
 
,Mg)B
 
2
Si
 
2
O
 
10
9.AJ.20Melanocerite-(Ce)
(Ce,Ca)
 
5
(Si,B)
 
3
O
 
12
(OH,F) · nH
 
2
O
9.AJ.20Minasgeraisite-(Y)
CaBe
 
2
Y
 
2
Si
 
2
O
 
10
9.AJ.20Calcybeborosilite-(Y)
(Y,Ca)
 
2
(□,Fe
2+
 
)(B,Be)
 
2
[SiO
 
4
]
 
2
(OH,O)
 
2
9.AJ.30Cappelenite-(Y)
Ba(Y,Ce)
 
6
Si
 
3
B
 
6
O
 
24
F
 
2
9.AJ.35Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
9.AJ.35Vicanite-(Ce)
(Ca,Ce,La,Th)
 
15
As
5+
 
(As
3+
0.5
,Na
 
0.5
)Fe
3+
 
Si
 
6
B
 
4
O
 
40
F
 
7
9.AJ.35Hundholmenite-(Y)
(Y,REE,Ca,Na)
 
15
(Al,Fe
3+
 
)(Ca
 
x
As
3+
1-x
)(Si,As
5+
 
)Si
 
6
B
 
3
(O,F)
 
48
9.AJ.35Proshchenkoite-(Y)
Ca(Y,REE,Ca,Na,Mn)
 
15
Fe
2+
 
(P,Si)Si
 
6
B
 
3
O
 
34
F
 
14
9.AJ.40Jadarite
LiNaSiB
 
3
O
 
7
(OH)
Related Minerals - Hey's Index Grouping:

- +
17.5.1Manandonite
LiAl
 
4
(BSi
 
3
O
 
10
)(OH)
 
6
17.5.2Reedmergnerite
Na[BSi
 
3
O
 
8
]
17.5.3Searlesite
Na(H
 
2
BSi
 
2
O
 
7
)
17.5.4Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
17.5.5Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.6Kalborsite
K
 
6
Al
 
4
BSi
 
6
O
 
20
(OH)
 
4
Cl
17.5.7Boromuscovite
KAl
 
2
(BSi
 
3
O
 
10
)(OH)
 
2
17.5.8Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
17.5.9Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.10Datolite
Ca(HBSiO
 
5
)
17.5.11Danburite
CaB
 
2
Si
 
2
O
 
8
17.5.12Howlite
Ca
 
2
B
 
5
SiO
 
9
(OH)
 
5
17.5.13Bakerite
Ca
 
4
(H
 
5
B
 
5
Si
 
3
O
 
20
)
17.5.14Oyelite
Ca
 
10
Si
 
8
B
 
2
O
 
29
· 12.5H
 
2
O
17.5.15Kornerupine
Mg
 
3
Al
 
6
(Si,Al,B)
 
5
O
 
21
(OH)
17.5.16Harkerite
Ca
 
12
Mg
 
4
Al(BO
 
3
)
 
3
(SiO
 
4
)
 
4
(CO
 
3
)
 
5
· H
 
2
O
17.5.17Serendibite
(Ca,Na)
 
2
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
3
[O
 
2
|(Si,Al,B)
 
6
O
 
18
]
17.5.19Tadzhikite-(Ce)
(Ca,Ce)
 
4
(Ce,Y)
 
2
(Ti
4+
 
,Fe
3+
 
,Al)[B
 
4
Si
 
4
O
 
22
](OH)
 
2
17.5.20Melanocerite-(Ce)
(Ce,Ca)
 
5
(Si,B)
 
3
O
 
12
(OH,F) · nH
 
2
O
17.5.21Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
17.5.22Tritomite-(Ce)
(Ce,La,Y,Th)
 
5
(Si,B)
 
3
(O,OH,F)
 
13
17.5.23Tritomite-(Y)
(Y,Ca,La,Fe)
 
5
(Si,B,Al)
 
3
(O,OH,F)
 
13
17.5.24Cappelenite-(Y)
Ba(Y,Ce)
 
6
Si
 
3
B
 
6
O
 
24
F
 
2
17.5.25Dumortierite
(Al,Fe
3+
 
)
 
7
(SiO
 
4
)
 
3
(BO
 
3
)O
 
3
17.5.26Holtite
(Ta
 
0.6
 
0.4
)Al
 
6
BSi
 
3
O
 
18
(O,OH)
 
2.25
17.5.27Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.28 Ferridravite
17.5.29Axinite-(Mg)
Ca
 
2
MgAl
 
2
BSi
 
4
O
 
15
OH
17.5.30Uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F/OH)
17.5.31Garrelsite
Ba
 
3
NaSi
 
2
B
 
7
O
 
16
(OH)
 
4
17.5.32Tienshanite
KNa
 
3
Na
 
6
Ca
 
2
Ba
 
6
Mn
 
6
(Ti
4+
 
,Nb)
 
6
B
 
12
Si
 
36
O
 
114
(O,OH,F)
 
11
17.5.33Leucosphenite
BaNa
 
4
Ti
 
2
B
 
2
Si
 
10
O
 
30
17.5.34Taramellite
Ba
 
4
(Fe
3+
 
,Ti,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
17.5.35Titantaramellite
Ba
 
4
(Ti,Fe
3+
 
,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
17.5.36Nagashimalite
Ba
 
4
(V,Ti)
 
4
B
 
2
Si
 
8
O
 
27
(O,OH)
 
2
Cl
17.5.37Chromium-dravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.38Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
17.5.39Werdingite
(Mg,Fe)
 
2
Al
 
14
Si
 
4
B
 
4
O
 
37
17.5.40Axinite-(Mn)
Ca
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
17.5.41Axinite
17.5.42Tinzenite
(CaMn
2+
 
)
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
17.5.44Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.45Fluor-buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
17.5.46Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.47Axinite-(Fe)
Ca
 
2
Fe
2+
 
Al
 
2
BSi
 
4
O
 
15
OH
17.5.48Homilite
Ca
 
2
(Fe
2+
 
,Mg)B
 
2
Si
 
2
O
 
10
17.5.49Grandidierite
(Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
17.5.50Hyalotekite
(Pb,Ba,K)
 
4
(Ca,Y)
 
2
(B,Be)
 
2
(Si,B)
 
2
Si
 
8
O
 
28
(F,Cl)
17.5.51Hellandite-(Y)
(Ca,REE)
 
4
Y
 
2
Al(Be,Li)
 
2-x
B
 
4
Si
 
4
O
 
22
(OH)
 
2

Other Names for Stillwellite-(Ce)

Other Languages:
German:Stillwellit-(Ce)
Russian:Стиллуэллит-(Ce)
Simplified Chinese:菱硼硅铈矿
Traditional Chinese:菱硼矽鈰礦

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 Stillwellite-(Ce)

Reference List:

- +
Nature (1955), 176, 509-510.

American Mineralogist (1956): 41: 370.

American Mineralogist (1992): 77: 1308.

Neues Jahrbuch für Mineralogie, Monatshefte (1992): 49-57.

Canadian Mineralogist (1993): 31: 147-152.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Stillwellite-(Ce)

Search Engines:
  • Look for Stillwellite-(Ce) on Google
  • Look for Stillwellite-(Ce) images on Google
  • External Links:
  • Look for Stillwellite-(Ce) on Webmineral
  • Look for Stillwellite-(Ce) on Athena Mineralogy
  • Look for Stillwellite-(Ce) on Wikipedia
  • Look for Stillwellite-(Ce) on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Stillwellite-(Ce) details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Top quality minerals from Kristalle of California
  • Wilensky Fine Minerals
  • High-end worldwide specimens & outstanding customer service
  • Fine minerals from bisbeeborn.com
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Buy RARE Minerals from Rocks of Africa
  • Buy minerals from YourMineralCollection
  • SpiriferMinerals.com - high quality low prices
  • The Arkenstone - Fine Minerals
  • Buy from David K Joyce minerals
  • Find Stillwellite-(Ce) on www.crystalclassics.co.uk
  • Rare and Unusual minerals at Mineralogical Research Company
  • Localities for Stillwellite-(Ce)

    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.
    (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.
    Australia
     
    • Queensland
      • Mount Isa - Cloncurry area
        • Mary Kathleen district
    Nature 1955, 509; USGS Open File Report 81-1666
    Canada
     
    • Ontario
      • Haliburton Co.
        • Monmouth Township
    Sabina, A.P. (1982): Some rare minerals of the Bancroft area. Mineralogical Record 13 (4), 225 ;Geological Survey of Canada Miscellaneous Report 39; Christopher Fouts (1999) Report of Assessment Work Physical Assessment Geotechnical Assessment Mining claim: S.O. 1195060 SI/3, lot 31, con. XVII, Monmouth Township, Haliburton County
    • Québec
      • Montérégie
        • La Vallée-du-Richelieu RCM
          • Mont Saint-Hilaire
    Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    China
     
    • Liaoning Province (Manchuria; Dongbei Region)
    Garrett, D.E. (1998): Borates - Handbook of Deposits, Processing, Properties and Use. Academic Press (San Diego, London), 475 pp.
    France
     
    • Midi-Pyrénées
      • Ariège
    Patrice Queneau Collection
    Greenland
     
    • Kujalleq
      • Narsaq
    Soerensen, H. (2001): The Ilimaussaq alkaline complex, South Greenland: status of mineralogical research with new results, Geology of Greenland Survey Bulletin 190, GEUS; Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
    Italy
     
    • Latium
      • Rome Province
    Caponera, I., Fiori, S., Pucci, R., & Signoretti, E. (2007). I minerali dei Colli Albani. Un aggiornamento sugli ultimi dieci anni di ricerche. Rivista Mineralogica Italiana, 31 (2), 74-91.
        • Sacrofano Caldera
          • Sacrofano
      • Viterbo Province
    Della Ventura, G., Parodi, G.C., Stoppani, F.S. (1987): Minerali del Lazio. Rivista Mineralogica Italiana, 1/1987, 157-166
        • Vico Lake
          • Vetralla
    O. Dziallas
    No reference listed
    Carlini, R., Signoretti, E., 2003. Località minori del vulcano Vicano: Villa S.Giovanni in Tuscia e Mazzocchio. Il Cercapietre. Not. del Gruppo Mineralogico Romano, 1-2: 33-41
    Japan
     
    • Honshu Island
      • Chubu Region
        • Gifu Prefecture
          • Nakatsugawa City
    Hori (1974) Sanko-Gakkai Kou'en-Youshi, 3.
    Norway
     
    • Vestfold
      • Larvik
    Neumann, H.; Bergstøl, S. & Nilssen, B.(1966)." Stillwellite in the Langesundfjord nepheline syenite pegmatite dykes ". Norsk Geologisk Tidsskrift 46: 327-334
          • Barkevik area
    Neumann, H.; Bergstøl, S. & Nilssen, B.(1966)." Stillwellite in the Langesundfjord nepheline syenite pegmatite dykes ". Norsk Geologisk Tidsskrift 46: 327-334
    Russia
     
    • Eastern-Siberian Region
      • Sakha Republic (Saha Republic; Yakutia)
    [World of Stones 12:49]
          • Aldan
    http://geo.web.ru/druza/l-Inagli.htm
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mtn
        • Alai Range (Alayskiy)
    CanMin 42:107-119 (2004); Pautov L.A., Agakhanov A.A., Sokolova E.V., Hawthorne F., Karpenko V.Yu. (2011) Byzantievite, Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O21[(OH),F]43(H2O)1.5, a new mineral. New Data on Minerals 46:5-12; Agakhanov A.A., Pautov L.A., Karpenko V.Yu., Bekenova G.K., Uvarova Y.A. (2011) Orlovite, KLi2 TiSi4 O11F, a new mineral of the mica group New Mineral Data 46:13-19
    USA
     
    • New York
      • Essex Co.
    Rocks & Min. (2007) 82:242
          • Moriah Township
    http://gsa.confex.com/gsa/2005NE/finalprogram/abstract_83497.htm ; Rocks & Minerals 82:472-483
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: July 24, 2014 01:16:40
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds