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Kelyanite: (Hg+2)6(SbO6)BrCl2
Comments: B&W BSE image of an epoxy grain mount of kelyanite (1) and calomel (2) fragment. Location: Kelyan Sb-Hg mine, Buryatia, Siberia, Russia. Scale: See Image. © Diederik Visser
Kharaelakhite: (Pt,Cu,Pb,Fe,Ni)9S8
Comments: B&W BSE polished section image of a kharaelakhite (Xar) reaction rim on cooperate (Cup) and braggite (Br). Location: Komsolmol'skii mine, Talnakh Cu-Ni deposit, Norilsk district, Krasnoyarsk Territory, Siberia, Russia. Scale: Scale bar 20 µm. © Diederik Visser
Kimuraite-(Y): CaY2(CO3)4·6(H2O)
Comments: Tiny white kimuraite-(Y) crystals in fissures in basalt. Location: Kirigo, Hizen-Cho, Higashi, Matsuura-Gun, Saga Pref., Japan. Scale: Picture size 2cm. © Diederik Visser
Kintoreite: PbFe+++3(PO4)2(OH,H2O)6 Lusungite: (Sr,Pb)Fe+++3(PO4)2(OH)5·(H2O)
Comments: Greenish-yellow kintoreite crystals on limonite and or goethite. The specimen was originally labelled lusungite in the early 1990's and reinvestigation of the specimen showed it to be kintoreite. Location: Kintore Open Cut, Broken Hill, NSW, Australia. Scale: Specimen Size 3x6 cm. © Diederik Visser
Krutovite: NiAs2
Comments: Gray silivery metallic krutovite grains in matrix. Location: Belorechensk, Krasnodarskij oblast, southeast of Krasnodar, Russia. Scale: Specimen Size 5x2 cm. © Diederik Visser
Kudriavite: (Cd,Pb)Bi2S4
Comments: Tufts of gray metallic kudriavite crystals on matrix. Location: Mutnovskyi Volcano, Kamchatka, Russia. Scale: Sample Size 5x5 mm. © Diederik Visser
Kuzmenkoite-Mn: (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O)
Comments: Yellowish brown kuzmenkoite-Mn crystals on matrix, with smaller, more brown colored labuntsovite-Mn. Location: Mnt Flora, Lovozero, Kola, Russia. Scale: Sample Size 2x3 cm. © Diederik Visser
Laplandite-(Ce): Na4CeTiPSi7O22·5(H2O)
Comments: Grayish-white radial aggregates of laplandite-(Ce). Location: Yubileinaya pegmatite, Karnasurt Mt, Lovozero Massif, Kola Peninsula, Russia. Scale: Picture Size 3 mm. © Diederik Visser
Lavrentievite: Hg3S2(Cl,Br)2
Comments: Yellow - brown lavrentievite with red cinnabar crystals in matrix. Location: Kadyrel'skoye Deposit, Tuva, Siberia, Russia. Scale: Not Given. © Diederik Visser
Lepkhenelmite-Zn: Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O)
Comments: B&W image of fragments of lepkhenelmite-Zn. Location: Lepkhe-Nel'm Mt., Lovozero, Kola, Russia. Scale: See Image. © Diederik Visser
Lokkaite-(Y): CaY4(CO3)7·9(H2O)
Comments: White coating of lokkaite-(Y) on matrix with hellandite and possible kainosite. Location: Evans-Lou Quarry, Quebec, Canada. Scale: Specimen Size 3 x 5 cm. © Diederik Visser
Loveringite: (Ca,Ce)(Ti,Fe+++,Cr,Mg)21O38
Comments: Small clusters of tiny (20 microns) black metallic acicular joveringite crystals in/on phlogopite. Location: Jimbelana Dyke, Norseman, Western Australia, Australia. Scale: Specimen Size 2.5x4 cm. © Diederik Visser
Lusungite: (Sr,Pb)Fe+++3(PO4)2(OH)5·(H2O) Kintoreite: PbFe+++3(PO4)2(OH,H2O)6
Magnesiozippeite: Mg(H2O)3.5(UO2)2(SO4)O2 Marecottite: Mg3(H2O)18[(UO2)4O3(SO4)2]2·10(H2O)
Comments: Powdery and crystalline aggregates of red-brown marecottite and yellow magnesiozippeite on matrix. Location: Svornost Mine, Jachymov, Bohemia, Czech Republic. Scale: Specimen Size 6.5x9 cm. © Diederik Visser
Manganonordite-(Ce): Na3SrCeMn++Si6O17
Comments: Light brown radial aggregates of manganonordite-(Ce) in ussingite. Location: Mt. Punkuruaiv, Lovozero, Kola Peninsula, Russia. Scale: Not Given. © Diederik Visser
Marecottite: Mg3(H2O)18[(UO2)4O3(SO4)2]2·10(H2O) Magnesiozippeite: Mg(H2O)3.5(UO2)2(SO4)O2
Mayenite: Ca12Al14O33
Comments: Gray mayenite grains in matrix. Location: Bellerberg, Eifel, Germany. Scale: Picture size 1 mm. © Diederik Visser
Metavandendriesscheite: PbU7O22·n(H2O)(n<12)
Comments: Botryoidal crusts of orange metavandendriesscheite with red- to yellow-brown prismatic masyuite. Location: Giftkiesstollen, Jachymov, Bohemia, Czech Republic. Scale: Not Given. © Diederik Visser
Metavanmeersscheite: U++++++(UO2)3(PO4)2(OH)6·2(H2O) Vanmeersscheite: U++++++(UO2)3(PO4)2(OH)6·4(H2O)
Comments: Yellow coatings of vanmeersscheite on sandstone. Unless sealed in glass, all specimens should be considered to have become metavanmeersscheite. Location: Cameron, Coconino Co., Arizona, USA. Scale: Sample Size 4 cm Glass Vial. © Diederik Visser
Middendorfite: K3Na2Mn5Si12(O,OH)36·2H2O
Comments: Dark orange platy middendorfite in quartz matrix. Location: Kirovskii Mine, Kukisvumchorr, Chibiny, Kola, Russia. Scale: Not Given. © Diederik Visser