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Magnesiorowlandite-(Y)

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Formula:
Y4(Mg,Fe)(Si2O7)2F2
Colour:
Gray to white
Lustre:
Vitreous, Greasy
Hardness:
5 - 5½
Specific Gravity:
4.82 (Calculated)
Crystal System:
Triclinic
Name:
Name after its relation with rowlandite-(Y).
Mg analogue of rowlandite-(Y).


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Classification of Magnesiorowlandite-(Y)Hide

Approved
Approval Year:
2012

Physical Properties of Magnesiorowlandite-(Y)Hide

Vitreous, Greasy
Transparency:
Transparent
Comment:
Vitrous to oily lustre
Colour:
Gray to white
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Cleavage:
None Observed
Density:
4.82 g/cm3 (Calculated)

Optical Data of Magnesiorowlandite-(Y)Hide

Type:
Biaxial (-)
RI values:
nα = 1.755(5) nγ = 1.760(5)
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Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Comments:
With pleochroism

Chemical Properties of Magnesiorowlandite-(Y)Hide

Formula:
Y4(Mg,Fe)(Si2O7)2F2

Crystallography of Magnesiorowlandite-(Y)Hide

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 6.527(6) Å, b = 8.656(9) Å, c = 5.519(5) Å
α = 99.09(8)°, β = 104.17(7)°, γ = 91.48(8)°
Ratio:
a:b:c = 0.754 : 1 : 0.638
Unit Cell V:
297.9 ų
Z:
1
Morphology:
Non–metamict aggregates

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.95 (33)
3.64 (37)
3.54 (38)
3.08 (100)
2.92 (26)
2.68 (32)
2.63 (28)
2.09 (35)

Type Occurrence of Magnesiorowlandite-(Y)Hide

General Appearance of Type Material:
Aggregates up to 1 cm in composed of gray massive and white powdery parts.
Place of Conservation of Type Material:
National Museum of Nature and Science, Tokyo, registered number NSM-M43624
Geological Setting of Type Material:
granite pegmatite
Associated Minerals at Type Locality:

Synonyms of Magnesiorowlandite-(Y)Hide

Other Language Names for Magnesiorowlandite-(Y)Hide

Other InformationHide

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 Magnesiorowlandite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Matsubara, S., Miyawaki, R., Yokoyama, K., Shigeoka, M., Momma, K. and Yamamoto, S. (2012) Magnesiorowlandite-(Y), IMA 2012-010. CNMNC Newsletter No. 13, June 2012, page 815; Mineralogical Magazine, 76, 807?-817.
Matsubara, S., Miyawaki, R., Yokoyama, K., Shigeoka, M., Momma, K., Yamamoto, S. (2014): Magnesiorowlandite-(Y), Y4Mg(Si2O7)2F2, a new mineral in a pegmatite at Souri Valley, Komono, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 109, 109-117.

Internet Links for Magnesiorowlandite-(Y)Hide

Localities for Magnesiorowlandite-(Y)Hide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Japan (TL)
 
  • Honshu Island
    • Kinki region
      • Mie Prefecture
        • Komono town
          • Yunoyama-onsen
Matsubara, S., et al (2011) Abstracts of the 136th Meeting, Mineral Sciences Japan, 2011-09-05; Matsubara, S., Miyawaki, R., Yokoyama, K., Shigeoka, M., Momma, K., Yamamoto, S. (2014): Magnesiorowlandite-(Y), Y4Mg(Si2O7)2F2, a new mineral in a pegmatite at Souri Valley, Komono, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 109, 109-117.
Mineral and/or Locality  
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