Rippite
Rippite is an IMA-recognized mineral species in the silicate class, with the chemical formula K₂(Nb,Ti)₂(Si₄O₁₂)O(O,F).
It crystallizes in the tetragonal crystal system (space group P4bm).
Key properties: Mohs hardness 4–5; specific gravity 3.17; White streak; Vitreous luster; optically uniaxial.
IMA symbol Rip, IMA status: approved, named in 2016.
Found in calciocarbonatites in an alkaline ultramafic complex.
It is found associated with Calcite, fluorcalciopyrochlore, tainiolite, fluorapatite, fluorite, Nb-rich rutile, olekminskite, K-feldspar, Fe-Mn-dolomite, quartz, goethite.
The mineral was named to honor German Samuilovich Ripp (b. 1935), an expert on carbonatite petrogenesis.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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