Mineral Specimen Images (R)

Raadeite: Mg7(PO4)2(OH)8  
Heneuite: CaMg5(PO4)3(CO3)(OH)

Comments: Translucent aqua colored greasy heneuite grain, surrounded by beige rim of raadeite, with dark blue phosphoellenbergerite inclusion (near top of heneuite), in quartz apatite rock.
Location: Tingelstadt Iron Mine, Modum, Buskerud, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Raadeite: Mg7(PO4)2(OH)8

Comments: Black and white image of a petrographic thin section showing two crystals of raadeite (arrows) included in holtedahlite. (Eur. J. Mineral, 13:320).
Location: Nodules of apatite + Mg-phosphates within the Tingelstadtjern serpentinite body, Modum district, Norway. Scale: See Image.
© Eur. J. Mineral

Rabbittite: Ca3Mg3(UO2)2(CO3)6(OH)4·18(H2O)

Comments: Fine, yellow, acicular sprays of rabbittite to about 1mm on matrix.
Location: Hideout mine, San Juan Co., Utah, USA. Scale: 20x10x4mm.
© Tom Loomis / Dakota Matrix

Rabejacite: Ca(UO2)4(SO4)2(OH)6·6(H2O)

Comments: Yellow rabejacite grains on matrix.
Location: Mas d'Alary, Lodève, Hérault, Languedoc-Roussillon, France. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Radhakrishnaite: PbTe3(Cl,S)2  
Kolarite: PbTeCl2

Comments: Kolarite (1) and radhakrishnaite (2), replacing altaite (white) in galena (ight grey). (CanMin, v23:501).
Location: 1500 m level, Kolar gold deposit, India. Scale: Scale Bar 0.02 mm.
© Canadian Mineralogist

Radhakrishnaite: PbTe3(Cl,S)2

Comments: Polished Section image of radhakrishnaite (Rad) with bluish to brownish tarnishing colors.
Location: Oktyabrsky Mine, Norilsk, Russia. Scale: Picture Size 0.16 mm.
© Thomas Witzke

Radtkeite: Hg3S2ClI  
Corderoite: Hg3S2Cl2

Comments: SEM image of prismatic radtkeite crystals and equant corderoite crystals on quartz matrix. AmMin, v76:1715).
Location: McDermitt mercury mine, Humboldt County, Nevada, USA. Scale: Scale Bar 10 µm.
© American Mineralogist

Raguinite: TlFeS2

Comments: Murky gray-brown fine grained raguinite mass, intermixed with pyrite.
Location: Allchar, Macedonia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Raite: Na4Mn++4Si8(O,OH)24·9(H2O)

Comments: Golden raite crystals up to 2 mm long filling cavities in white microcline with minor lomonosovite and natrolite.
Location: Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: 7x4x3 cm.
© John Betts - Fine Minerals

Raite: Na4Mn++4Si8(O,OH)24·9(H2O)  
Mountainite: (Ca,Na2,K2)2Si4O10·3(H2O)

Comments: Bright white fibrous acicular mountainite crystal aggregate with pale golden raite.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rajite: CuTe++++2O5

Comments: Bluish green coating of rajite on matrix.
Location: Lone Pine mine, Catron Co., New Mexico, USA. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Ralstonite: NaxMgxAl2-x(F,OH)6·(H2O)  
Cryolite: Na3AlF6

Comments: Massive cryolite with solution cavities lined with octahedral ralstonite crystals.
Location: Ivigtut, Greenland. Scale: Picture size 0.5 cm.
© John Veevaert

Ralstonite: NaxMgxAl2-x(F,OH)6·(H2O)  
Gjerdingenite-Fe: K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O)

Comments: SEM photomicrograph of gjerdingenite-Fe. The mineral is dusted with tiny crystals of two phases. At high magnification, one of them is seen to form cubes and is probably ralstonite.
Location: Gjerdingselva, Lunner, Oppland, Oslo Region, Norway. Scale: Crystal length 0.5 mm.
© Canadian Mineralogist

Ramanite-(Cs): Cs[B5O6(OH)4]·2H2O  
Ramanite-(Rb): Rb[B5O6(OH)4]·2H2O  
Santite: KB5O6(OH)4·2(H2O)

Comments: Unheated Type-B melt inclusions in graphic quartz. 1 = ramanite-(Cs), 2 = sassolite, 3 = ramanite-(Rb), 4 = santite, 5 = topaz, V = vapor. (AmMin, v93:1035).
Location: Graphic pegmatite quartz from the Island of Elba, Italy. Scale: Scale Bar 15µm.
© American Mineralogist

Ramanite-(Rb): Rb[B5O6(OH)4]·2H2O  
Ramanite-(Cs): Cs[B5O6(OH)4]·2H2O  
Santite: KB5O6(OH)4·2(H2O)

Comments: Unheated Type-B melt inclusions in graphic quartz. 1 = ramanite-(Cs), 2 = sassolite, 3 = ramanite-(Rb), 4 = santite, 5 = topaz, V = vapor. (AmMin, v93:1035).
Location: Graphic pegmatite quartz from the Island of Elba, Italy. Scale: Scale Bar 15µm.
© American Mineralogist

Rambergite: MnS  
Hauerite: MnS2

Comments: Small black octahedral crystals of hauerite with small brown crystals of rambergite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Rambergite: MnS

Comments: Dark reddish-brown rambergite mass in matrix.
Location: Ronneberg, Thuringen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rameauite: K2CaU++++++6O20·9(H2O)

Comments: Yellow crystals of rameauite on matrix.
Location: Marignac, Compreignac, Haute Vienne, France. Scale: Picture Size 4 mm.
© Thomas Witzke

Rammelsbergite: NiAs2

Comments: Dull gray metallic botryoidal rammelsbergite aggregate with crystalline surface.
Location: Hudson Bay Mine, Rusty Lake, Gowganda, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ramsbeckite: (Cu,Zn)15(SO4)4(OH)22·6(H2O)

Comments: Green crystals of ramsbeckite on matrix.
Location: Gelbe Birke Mine, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag