ودجنيت

Wodginite
Cassiterite-Wodginite-md36b.jpg
Wodginite over cassiterite
العامة
التصنيفOxide - Tantalate mineral
الصيغة
(repeating unit)
Mn2+(Sn,Ta)Ta
2
O
8
تصنيف سترونز4.DB.40
تصنيف دانا08.01.08.01
النظام البلوريMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupC2/c (no. 15)
التعرف
ColorReddish brown, dark brown to black
Crystal habitFlattened dipyramidal to prismatic crystals in radiating groups; granular, massive.
TwinningVery common as penetration twins
Cleavagenone
FractureIrregular
TenacityBrittle
Mohs scale hardness5.5
LusterSub-metallic
StreakBrown
DiaphaneityOpaque, translucent in thin fragments
الجاذبية النوعية7.19–7.36
References[1][2][3][4]

Wodginite is a manganese, tin, tantalum oxide mineral with the chemical formula Mn2+(Sn,Ta)Ta
2
O
8
. It may also include significant amounts of niobium.[1][2]

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خلفية

Wodginite was first described in 1963 for an occurrence in the Wodgina pegmatite, ودجينا، منطقة پيلبارا، أستراليا الغربية.[3]

Typical occurrence of Wodginite occurs in zoned pegmatites in amphibolite. It is associated with tantalite, albite, quartz, muscovite, tapiolite, microlite and microcline.[1]

It occurs in pegmatites in a wide variety of locations. The most studied is the Tanco pegmatite in Manitoba, Canada; also in Red Lake, Ontario. It is reported from the Strickland quarry, Portland, Middlesex County, Connecticut; the Herbb #2 pegmatite, Powhatan County, Virginia; the McAllister mine, Rockford, Coosa County, Alabama; the Peerless mine, Pennington County, South Dakota. Also from Paraíba and Minas Gerais, Brazil; Krasonice, جمهورية التشيك؛ Orivesi, Finland; Kalba, eastern Kazakhstan; Ankole, Uganda; Miami district, Zimbabwe and كاريبيب and Kohero, Namibia.[1][3]


المراجع

  1. ^ أ ب ت ث Handbook of Mineralogy
  2. ^ أ ب Webmineral data
  3. ^ أ ب ت Mindat.org
  4. ^ Ercit, T.S.; Hawthorne, F.C.; Cerny, P. (1992). "The wodginite group. I. Structural crystallography". The Canadian Mineralogist. 30: 597–611. Retrieved 31 December 2020.
  5. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  6. ^ Ercit, T. S.; Hawthorne, F.; Cerny, P. (1992). "The wodginite group: I. structural crystallography". Canadian Mineralogist. 30: 597–611.

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