Moore, Paul B. (1978) Welshite, Ca2Mg4Fe3+Sb5+O2[Si4Be2O18], a new member of the aenigmatite group. Mineralogical Magazine, 42 (321) 129-132 doi:10.1180/minmag.1978.042.321.19
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Welshite, Ca2Mg4Fe3+Sb5+O2[Si4Be2O18], a new member of the aenigmatite group | ||
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
| Authors | Moore, Paul B. | Author | |
| Year | 1978 (March) | Volume | 42 |
| Issue | 321 | ||
| Publisher | Mineralogical Society | ||
| Download URL | https://rruff.info/doclib/MinMag/Volume_42/42-321-129.pdf+ | ||
| DOI | doi:10.1180/minmag.1978.042.321.19Search in ResearchGate | ||
| Generate Citation Formats | |||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 2870 | Long-form Identifier | mindat:1:5:2870:1 |
| GUID | 0 | ||
| Full Reference | Moore, Paul B. (1978) Welshite, Ca2Mg4Fe3+Sb5+O2[Si4Be2O18], a new member of the aenigmatite group. Mineralogical Magazine, 42 (321) 129-132 doi:10.1180/minmag.1978.042.321.19 | ||
| Plain Text | Moore, Paul B. (1978) Welshite, Ca2Mg4Fe3+Sb5+O2[Si4Be2O18], a new member of the aenigmatite group. Mineralogical Magazine, 42 (321) 129-132 doi:10.1180/minmag.1978.042.321.19 | ||
| In | (1978, March) Mineralogical Magazine Vol. 42 (321) Mineralogical Society | ||
| Abstract/Notes | Welshite, triclinic, Ca2Mg4Fe3+Sb5+O2 [Si4Be2O18], a = 10·28 Å, b = 10·69 Å, c = 8·83 Å, α = 106·1°, β = 96·3°, γ = 124·8°, P¯1 with pseudo-monoclinic cell am = 9·68(1) Å, bm = 14·77(2) Å, cm = 5·14(1) Å, βm = 101·5(2)°, c-centred, occurs as lustrous subadaman-tine, thick prismatic reddish-black crystals up to 3 mm in greatest dimension associated with roméite, adelite, swedenborgite, berzeliite, manganoan phlogopite, richterite in crystalline dolomite from Làngban, Sweden. Forms include b {010}, a{100}, k{130}, m{110}, j{021}, p{111}, q{121}, v{131}, r{¯111}, s{¯121}, t{¯131}, and v{¯141} (monoclinic setting). Streak pale-brown, hardness 6, specific gravity 3·77, fracture conchoidal, no cleavage, α = 1·81(1), γ = 1·83(1), 2E(obs.) ≈45°, no noticcable pleochroism.Welshite is a new member of the aenigmatite-rhönite group and obtains from the substitution Sb5+→ Ti4+ and Be2+ → Al3+ in rhönite. | ||
Map of Localities
Mineral Pages
| Mineral | Citation Details |
|---|---|
| Welshite |
Mineral Occurrences
| Locality | Mineral(s) |
|---|---|
| Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden | ⓘ Welshite |
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