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Rowlandite-(Y)

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Henry Augustus Rowland
Formula:
(Y,Ce)4Fe2+(Si2O7)2F2 (?)
System:
Triclinic
Colour:
Pale dull green, greyish ...
Hardness:
5½ - 6½
Name:
Named after Henry Augustus Rowland (1848-1901), Professor of Physics.
Commonly metamict.

Classification of Rowlandite-(Y)

Approved
9.HG.20

9 : SILICATES (Germanates)
H : Unclassified silicates
G : With REE, Th
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
17.1.18

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)
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First Recorded Occurrence of Rowlandite-(Y)

Geological Setting of First Recorded Material:
Rare earth pegmatite
Associated Minerals at First Recorded Locality:

Occurrences of Rowlandite-(Y)

Geological Setting:
Rare earth bearing pegmatites

Physical Properties of Rowlandite-(Y)

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:
4.33 g/cm3 (Calculated)
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
Z:
1
Morphology:
Small irregular masses.
Comment:
Commonly metamict.

Optical Data of Rowlandite-(Y)

Type:
Biaxial (+)
RI values:
nα = 1.763 nγ = 1.769
Max Birefringence:
δ = 0.006
Image 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)4Fe2+(Si2O7)2F2 (?)
Essential elements:
All elements listed in formula:

Relationship of Rowlandite-(Y) to other Species

17.1.1HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2
17.1.3AgrelliteNaCa2Si4O10F
17.1.4Fluorapophyllite-(Na)NaCa4(Si8O20)F · 8H2O
17.1.5Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
17.1.6Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
17.1.7HsianghualiteCa3Li2(Be3Si3O12)F2
17.1.8LeucophaniteNaCaBeSi2O6F
17.1.9NorbergiteMg3(SiO4)(F,OH)2
17.1.10Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
17.1.11Humite(Mg,Fe2+)7(SiO4)3(F,OH)2
17.1.12ClinohumiteMg9(SiO4)4F2
17.1.13CanasiteK2Na4Ca5(Si12O30(OH,F)4
17.1.14Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
17.1.15CuspidineCa4(Si2O7)(F,OH)2
17.1.16BultfonteiniteCa2(HSiO4)F · H2O
17.1.17ZeophylliteCa13(Si10O28)F10 · 6H2O
17.1.19Yuksporite(K,Ba)NaCa2(Si,Ti)4O11(F,OH) · H2O
17.1.20Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
17.1.21Mosandrite(◻,Ca,Na)3(Ca,REE)4Ti(Si2O7)2[H2O,OH,F]4 · H2O
17.1.22Hiortdahlite(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
17.1.23BurpaliteNa2CaZr(Si2O7)F2
17.1.24SeidozeriteNa8Mn22+Zr3Ti3(Si2O7)4O4F4
17.1.25ThorosteenstrupineCaMnThSi4O11(OH)F · 6H2O
17.1.26Zircophyllite(K,Na)3(Mn,Fe2+)7(Zr,Ti)2Si8O24(O,OH,F)7
17.1.27JinshajiangiteBaNaFe42+Ti2(Si2O7)2O2(OH)2F
17.1.28Rosenbuschite(Ca,Na)3(Zr,Ti)(Si2O7)OF
17.1.29NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2
17.1.30SonoliteMn92+(SiO4)4(OH,F)2

Other Information

Other Information:
Commonly metamict
Health Risks:
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)

Localities for Rowlandite-(Y)

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Finland
 
  • Western and Inner Finland Region
    • Kangasala
Siivola, J. 1975. The lanthanoid conted of some minerals from the Pyörönmaa pegmatite in Kangasala, Finland. Geological Survey of Finland, Bulletin 276, 17 s.
Kazakhstan
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
Norway
 
  • Nordland
    • Tysfjord
      • Drag
        • Lapplægeret
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  
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