Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Rowlandite-(Y)

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

Stetind, Tysfjord, Nordland, Norway
© luigi chiappino

Show Rowlandite-(Y) Photos (2)



Formula:
(Y,Ce)
 
4
Fe
2+
 
(Si
 
2
O
 
7
)
 
2
F
 
2
 (?)
System:TriclinicColour:Pale dull green, greyish ...
Hardness:5½ - 6½
Name:
Named after Henry Augustus Rowland (1848-1901), Professor of Physics.


Commonly metamict.

Classification of Rowlandite-(Y)

IMA status:Approved
Strunz 8th edition ID:8/C.01-50
Nickel-Strunz 10th (pending) edition ID:9.HG.20

9 : SILICATES (Germanates)
H : Unclassified silicates
G : With REE, Th
Dana 8th edition ID:55.2.1b.1

55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
2 : Si2O7 Groups, Generally with no Additional Anions with cations in [6] coordination
Hey's CIM Ref.:17.1.18

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)
mindat.org URL:http://www.mindat.org/min-3467.html
Please feel free to link to this page.

Type Occurrence of Rowlandite-(Y)

Type Locality:Baringer Hill (Barringer Hill), Bluffton, Llano Co., Texas, USA
Geological Setting of type material:Rare earth pegmatite
Associated Minerals at type locality:
GadoliniteGadolinite

Occurrences of Rowlandite-(Y)

Geological Setting:Rare earth bearing pegmatites

Physical Properties of Rowlandite-(Y)

Lustre:Vitreous, Waxy
Diaphaneity (Transparency):Transparent
Comment:Waxy when altered
Colour:Pale dull green, greyish white
Comment:alters to brick red
Hardness (Mohs):5½ - 6½
Density (calculated):4.33 g/cm3
Comment:4.30 - metamict, 4.55 when heated to 050 for hour, 4.85 when crystalline

Crystallography of Rowlandite-(Y)

Crystal System:Triclinic
Cell Parameters:a = 6.59Å, b = 8.65Å, c = 5.53Å
α = 99.03°, β = 104.12°, γ = 91.47°
Ratio:a:b:c = 0.762 : 1 : 0.639
Unit Cell Volume:V 301.24 ų (Calculated from Unit Cell)
Z:1
Morphology:Small irregular masses.
Comment:Commonly metamict.

Optical Data of Rowlandite-(Y)

Type:Biaxial (+)
RI values: nα = 1.763 nγ = 1.769
Maximum Birefringence:δ = 0.006

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Comments:Isotropic when metamict (n=1.704; 1.76 when heated)

Chemical Properties of Rowlandite-(Y)

Formula:
(Y,Ce)
 
4
Fe
2+
 
(Si
 
2
O
 
7
)
 
2
F
 
2
 (?)
Essential elements:F, Fe, O, Si, Y
All elements listed in formula:Ce, F, Fe, O, Si, Y

Relationship of Rowlandite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.HG.15Umbozerite
Na
 
3
Sr
 
4
Th[Si(O,OH)
 
3-4
]
 
8
Related Minerals - Hey's Index Grouping:

- +
17.1.1Hectorite
Na
 
0.3
(Mg,Li)
 
3
(Si
 
4
O
 
10
)(F,OH)
 
2
17.1.3Agrellite
NaCa
 
2
Si
 
4
O
 
10
F
17.1.4Apophyllite-(NaF)
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
17.1.5Apophyllite-(KF)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
17.1.6Apophyllite-(KOH)
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
17.1.7Hsianghualite
Ca
 
3
Li
 
2
(Be
 
3
Si
 
3
O
 
12
)F
 
2
17.1.8Leucophanite
NaCaBeSi
 
2
O
 
6
F
17.1.9Norbergite
Mg
 
3
(SiO
 
4
)(F,OH)
 
2
17.1.10Chondrodite
(Mg,Fe
2+
 
)
 
5
(SiO
 
4
)
 
2
(F,OH)
 
2
17.1.11Humite
(Mg,Fe
2+
 
)
 
7
(SiO
 
4
)
 
3
(F,OH)
 
2
17.1.12Clinohumite
(Mg,Fe
2+
 
)
 
9
(SiO
 
4
)
 
4
(F,OH)
 
2
17.1.13Canasite
K
 
2
Na
 
4
Ca
 
5
(Si
 
12
O
 
30
(OH,F)
 
4
17.1.14Charoite
(K,Na)
 
6-7
(Ca,Na)
 
18
[(Si
 
6
O
 
17
)(Si
 
12
O
 
30
)(Si
 
18
O
 
45
)](OH,F)
 
2
 · n H
 
2
O
17.1.15Cuspidine
Ca
 
4
(Si
 
2
O
 
7
)(F,OH)
 
2
17.1.16Bultfonteinite
Ca
 
2
(HSiO
 
4
)F · H
 
2
O
17.1.17Zeophyllite
Ca
 
4
Si
 
3
O
 
8
(OH,F)
 
4
 · 2H
 
2
O
17.1.19Yuksporite
(K,Ba)NaCa
 
2
(Si,Ti)
 
4
O
 
11
(F,OH) · H
 
2
O
17.1.20Yftisite-(Y)
(Y,Dy,Er)
 
4
(Ti,Sn)(SiO
 
4
)
 
2
O(F,OH)
 
6
17.1.21Mosandrite
Na
 
2
Ca
 
4
(REE)(Si
 
2
O
 
7
)
 
2
OF
 
3
17.1.22Hiortdahlite
(Ca,Na)
 
3
(Zr,Ti)(Si
 
2
O
 
7
)(O,OH,F)
 
2
17.1.23Burpalite
Na
 
2
CaZr(Si
 
2
O
 
7
)F
 
2
17.1.24Seidozerite
Na
 
8
Mn
2+
2
Zr
 
3
Ti
 
3
(Si
 
2
O
 
7
)
 
4
O
 
4
F
 
4
17.1.25Thorosteenstrupine
CaMnThSi
 
4
O
 
11
(OH)F · 6H
 
2
O
17.1.26Zircophyllite
(K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Zr,Ti)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
17.1.27Jinshajiangite
BaNaFe
2+
4
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH)
 
2
F
17.1.28Rosenbuschite
(Ca,Na)
 
3
(Zr,Ti)(Si
 
2
O
 
7
)OF
17.1.29Narsarsukite
Na
 
4
(Ti,Fe)
 
2
[Si
 
8
O
 
20
](O,OH,F)
 
2
17.1.30Sonolite
Mn
2+
9
(SiO
 
4
)
 
4
(OH,F)
 
2

Other Information

Other Information:Commonly metamict
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 Rowlandite-(Y)

Reference List:

- +
Frondel, C. (1961): Two yttrium minerals: spencite and rowlandite. Can. Mineral., 6, 576-58l.

Shipovalov, Y.V. and Stepanov, A.V. (1971): X-ray structural study of rowlandite. Issled. Oblast. Khim. Fiz. Metod. Anal. Min. Syr'ya, 189-192 (in Russian).

Internet Links for Rowlandite-(Y)

Search Engines:
  • Look for Rowlandite-(Y) on Google
  • Look for Rowlandite-(Y) images on Google
    • External Links:
  • Look for Rowlandite-(Y) on Webmineral
  • Look for Rowlandite-(Y) on Athena Mineralogy
  • Look for Rowlandite-(Y) on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Rowlandite-(Y) details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Wilensky Fine Minerals
  • High-end worldwide specimens & outstanding customer service
  • Buy RARE Minerals from Rocks of Africa
  • Visit the Pueblo Gem and Mineral show, Tucson 2012
  • Fine Minerals from Weinrich Minerals, Inc.
  • The Arkenstone - Fine Minerals
  • Search for Rowlandite-(Y) from all mineral dealers at minfind.com
  • webminerals
  • Search for minerals at Heliodor
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Edwards Minerals - Fine Specimens
  • By minerals from YourMineralCollection
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Rowlandite-(Y)

    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.
    Hide Locality List
    (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
     
    • Québec
      • Outaouais
        • Les Collines-de-l'Outaouais RCM
          • Val-des-Monts
            • Lac Saint-Pierre (Wakefield Lake)
    		www.minsocam.org/msa/Handbook/RowlanditeY.PDF.
    Kazakhstan
    Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    Norway
     
    • Nordland
      • Tysfjord
        • Drag
          • Lapplegret
    		Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum Skrift 38: 5-28
    Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
    Sweden
     
    • Lappland
      • Jokkmokk
        • Varjisträsk
    		Berg & Mineral 9 (23), 27
    USA
     
    • Colorado
      • Jefferson Co.
        • South Platte Pegmatite District
    		Minerals of Colorado (1997) E.B. Eckels
    • Texas
      • Burnet Co.
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
      • Llano Co.
        • Bluffton
    		CM 6 (1961), 576; Canadian Mineralogist (1961): 6: 576-581.; Am Min (1932) Volume 17, pages 381-390,
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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. 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: 20th Jun 2011 07:59:30
    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