• Jahnsite-(NaFeMg): Mineral information, data and localities.

    www.mindat.org/min-31994.html For the mineral jahnsite and its sodium, iron and magnesium content. The root name is in honor of Richard Henry Jahns (March 10, 1915 Los Angeles, California, USA - December 31, 1983 Palo Alto, California, USA), mineralogist and pegmatite expert, Stanford University, Palo Alto, California, USA.
  • Jahnsite-(NaFeMg) Mineral Data

    www.webmineral.com/data/Jahnsite-(NaFeMg).shtml General Jahnsite-(NaFeMg) Information : Chemical Formula: NaFe+++Mg2Fe+++2(PO4)4(OH)2•8H2O : Composition: Molecular Weight = 780.46 gm Sodium 2.12 % Na 2.86 % Na 2 O: Calcium 0.26 % Ca 0.36 % CaO: Magnesium 6.26 % Mg 10.38 % MgO: Manganese 0.28 % Mn 0.36 % MnO: Iron 19.46 % Fe 27.83 % Fe 2 O 3: Phosphorus 15.87 % P 36.37 % P 2 O 5
  • Jahnsite-(NaFeMg) mineral information and data

    www.dakotamatrix.com/mineralpedia/8747/jahnsite-nafemg Jahnsite - (NaFeMg) occurs in at the Tip Top pegmatite west of Custer, South Dakota. Thus far it has been a one-time find. Crystals occur as 1mm pseudo-orthorhombic twinned prisms to 1mm in tiny vugs within Heterosite with dark purple Leucophosphite and Dufrenite.
  • Jahnsite-(CaMnMg): Mineral information, data and localities.

    www.mindat.org/min-2067.html 2 photos of Jahnsite-(CaMnMg) associated with Jahnsite-(NaFeMg) NaFe 3+ Mg 2 Fe 3+ 2 (PO 4) 4 (OH) 2 · 8H 2 O: 2 photos of Jahnsite-(CaMnMg) associated with Jahnsite-(NaMnMg) {(Na,Ca)}{(Mn 2+,Fe 3+)}{(Mg,Fe 3+) 2}{Fe 3+ 2}(PO 4) 4 (OH) 2 · 8H 2 O: 2 photos of Jahnsite-(CaMnMg) associated with Jahnsite-(CaMgMg) {Ca}{Mg}{Mg 2}{Fe 3+ 2}(PO 4) 4 ...
  • Jahnsite-(NaFeMg), a new mineral from the Tip Top mine ...

    www.researchgate.net/.../250130201_Jahnsite-NaFeMg_a_new_mineral_from_the_Tip... Jahnsite-(NaFeMg) is the first member of the whiteite-jahnsite group in which a monovalent cation (Na(+)) predominantly occupies the X site and a trivalent cation (Fe(3+)) the M1 site. The ...
  • Jahnsite-(NaFeMg), a new mineral from the Tip Top mine ...

    www.minsocam.org/msa/ammin/toc/Abstracts/2008_Abstracts/.../Kampf_p940_08.pdf Jahnsite-(NaFeMg) is the first member of the whiteite-jahnsite group in which a monovalent cation (Na+) predominantly occupies the X site and a trivalent cation (Fe3+) the M1 site. The structure differs from that determined for
  • AMCSD Search Results - rruff.geo.arizona.edu

    rruff.geo.arizona.edu/AMS/minerals/Jahnsite-(NaFeMg) Jahnsite-(NaFeMg) Kampf A R, Steele I M, Loomis T A: American Mineralogist 93 (2008) 940-945: Jahnsite-(NaFeMg), a new mineral from the Tip Top mine, Custer County, South Dakota: Description and crystal structure: Locality: Tip Top mine, Custer County, South Dakota _database_code_amcsd 0004587: 15.0811 7.1403 9.8299 90 110.445 90 P2/a
  • Jahnsite-(NaFeMg), a new mineral from the Tip Top mine ...

    ui.adsabs.harvard.edu/abs/2008AmMin..93..940K/abstract Jahnsite-(NaFeMg), a new mineral from the Tip Top mine, Custer County, South Dakota: Description and crystal structure
  • www.researchgate.net

    www.researchgate.net/.../329825286_Jahnsite-NaMnMg_a_New_Jahnsite-Group_Miner... Jahnsite-(NaMnMg), (Na,Ca)(Mn2+,Fe3+)(Mg,Fe3+,Mn3+)2Fe3+2(PO4)4(OH)2(H2O)8, is a new mineral from the Sapucaia pegmatite, Conselheiro Pena pegmatite district, Minas ...
  • Whiteite-(CaFeMg) Mineral Data

    webmin.mindat.org/data/Whiteite-(CaFeMg).shtml General Whiteite-(CaFeMg) Information : Chemical Formula: Ca(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O) Composition: Molecular Weight = 756.29 gm Calcium 5.30 % Ca 7.41 % CaO: Magnesium 6.43 % Mg 10.66 % MgO: Manganese 1.82 % Mn 2.34 % MnO: Aluminum 7.14 % Al 13.48 % Al 2 O 3: Iron 5.54 % Fe 7.12 % FeO: Phosphorus 16.38 % P 37.54 % P 2 O 5