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![First thumbnail for: Crystal chemistry and nomenclature of rhodonite-gr...]()
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![First thumbnail for: Mangani-eckermannite, NaNa 2 (Mg 4 Mn 3+ )Si 8 O 2...]()
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![Rock consisting of vittinkiite (Vit), quartz (Q) and pyroxmangite (Pxm) from Vittinki (Vittinge) iron mines, Isokyrö, Finland (the holotype vittinkiite).]()
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![Сrystal structure of vittinkiite (a and b) and the fragment of polyhedral ribbon with marked sites (c). The Mn-centred (M) polyhedra are purple and Si-centred tetrahedra are yellow. Dashed lines contour the polyhedral slab (a) and polyhedral ribbon (b).]()
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![Infrared absorption spectra of (a) the holotype vittinkiite and (b) rhodonite with the composition Ca0.9Mn3.7Mg0.4(Si5O15) from Långban, Sweden.]()
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![The structure of (a, b) vittinkiite, (c, d) rhodonite and (e, f) ferrorhodonite viewed (a, c, e) orthogonal to [110] and (b, d, f) along [110]. M-site labels in (a) are also applicable to (c) and (e).]()
![Ratios of the major metal cations in minerals of the rhodonite group (a) and pyroxmangite–pyroxferroite series (b), based on literature (Sundius, 1931; Hietanen, 1938; Peacor and Niizeki, 1963; Momoi, 1964; Burnham, 1971; Ohashi and Finger, 1975; Peacor et al., 1978; Sapountzis and Christofides, 1982; Pinckney and Burnham, 1988; Nelson and Griffen, 2005; Shchipalkina et al., 2017; Brusnitsyn, 2000, 2013; 2015; Shchipalkina et al., 2016; and reference therein) and our data. In (a) samples with determined crystal structures are marked by filled circles: blue – rhodonite; light purple – vittinkiite; deep purple – synthetic analogue of the end-member vittinkiite; red – ferrorhodonite; green – Zn-rich variety of rhodonite (‘fowlerite’); and grey – Mg-enriched variety of rhodonite. Other vittinkiite samples are shown by empty purple circles whereas rhodonite and ferrorhodonite samples are empty blue circles. In (b) samples with a determined crystal structure are marked by black (filled) squares.]()
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![Anhedral grains of mangani-eckermannite (Meck) closely intergrown with braunite (Bnt), albite (Ab) and vittinkiite (Vtk). Polished section. Back-scattered electron image.]()
![A 0.7 cm thick vein consisting of dark red mangani-eckermannite intergrown with black braunite, pink vittinkiite and colourless albite in a rock mainly consisting of colourless to pale salmon-reddish quartz. Holotype sample #5774/1, size: 2 × 1.5 × 1.5 cm. Photo: M. Milshina.]()
![Cation ribbons and chains [Si5O15]∞ in the crystal structures of: (a) vittinkiite; (b) rhodonite; and (c) ferrorhodonite. The colour of polyhedra indicates the predominant cation: pink for Mn, grey for Ca and orange for Fe. For site labels and references see Table 2.]()
![Projections of crystal structures of MnSiO3 polymorphs: rhodonite type (vittinkiite, this work) (a), pyroxmangite (Narita et al., 1977) (b), clinopyroxene (Tokohami et al., 1979) (c) and tetragonal garnet (Fujino et al., 1986) (d). The unit cells are outlined.]()
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Journal Article
Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species Available to Purchase
Journal: Mineralogical Magazine
Published: 25 September 2020
Mineralogical Magazine (2020) 84 (6): 869–880.
...) Mn 3 VII M (4) Mn[Si 5 O 15 ] (Roman numerals indicate coordination numbers) is defined as a valid mineral species named vittinkiite after the type locality Vittinki (Vittinge) mines, Isokyrö, Western and Inner Finland Region, Finland. Vittinkiite is an isostructural analogue of rhodonite, ideally...
FIGURES
Journal Article
Crystal chemistry and nomenclature of rhodonite-group minerals Available to Purchase
Journal: Mineralogical Magazine
Published: 09 October 2019
Mineralogical Magazine (2019) 83 (6): 829–835.
...[Si 5 O 15 ], where A = Ca or Mn 2+ ; B = Mn 2+ ; and C = Mn 2+ or Fe 2+ . The end-member formulae of approved rhodonite-group minerals are as follows: rhodonite CaMn 3 Mn[Si 5 O 15 ]; ferrorhodonite CaMn 3 Fe[Si 5 O 15 ]; and vittinkiite MnMn 3 Mn[Si 5 O 15 ]. * Author for correspondence...
FIGURES
Journal Article
Mangani-eckermannite, NaNa 2 (Mg 4 Mn 3+ )Si 8 O 22 (OH) 2 , a new amphibole from Tanohata Mine, Iwate Prefecture, Japan Available to Purchase
Journal: Mineralogical Magazine
Published: 10 August 2023
Mineralogical Magazine (2023) 87 (6): 935–942.
..., Shimohei District, Iwate Prefecture, Japan. It occurs as prismatic crystals up to 0.3 × 0.2 mm and their aggregates up to 1 mm intergrown with braunite, vittinkiite and quartz. Mangani-eckermannite is cherry-red to very dark red and reddish-brown in thicker grains. It is translucent with a pinkish white...
FIGURES
Image
Rock consisting of vittinkiite (Vit), quartz (Q) and pyroxmangite (Pxm) fro... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Fig. 1. Rock consisting of vittinkiite (Vit), quartz (Q) and pyroxmangite (Pxm) from Vittinki (Vittinge) iron mines, Isokyrö, Finland (the holotype vittinkiite).
Image
Crystal data and refinement details for vittinkiite. Crystal dat... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Table 3. Crystal data and refinement details for vittinkiite. Crystal data Formula Mn 5 Si 5 O 15 Temperature (K) 293 Crystal size (mm) 0.26 × 0.23 × 0.14 Crystal system Triclinic Space group P $\bar{1}$ a (Å) 6.6980(3) b (Å) 7.6203(3) c
Image
Сrystal structure of vittinkiite ( a and b ) and the fragment of polyhedr... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Fig. 3. Сrystal structure of vittinkiite ( a and b ) and the fragment of polyhedral ribbon with marked sites ( c ). The Mn-centred ( M ) polyhedra are purple and Si-centred tetrahedra are yellow. Dashed lines contour the polyhedral slab ( a ) and polyhedral ribbon ( b ).
Image
Chemical composition of vittinkiite and representative earlier published an... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Table 1. Chemical composition of vittinkiite and representative earlier published analyses. Constituent Vittinki (Vittinge), Finland Bald Knob, North Carolina, USA Simsiö, Finland Taguchi, Aichi Pref., Japan Xanthi, Greece Malosedel'nikovskoe, deposit, Middle Urals, Russia
Image
Crystal data and refinement details for vittinkiite. Crystal dat... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Table 3. Crystal data and refinement details for vittinkiite. Crystal data Formula Mn 5 Si 5 O 15 Temperature (K) 293 Crystal size (mm) 0.26 × 0.23 × 0.14 Crystal system Triclinic Space group P $\bar{1}$ a (Å) 6.6980(3) b (Å) 7.6203(3) c
Image
Comparative data for vittinkiite, pyroxmangite and four synthetic polymorph... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Table 7. Comparative data for vittinkiite, pyroxmangite and four synthetic polymorphs of MnSiO 3 . Structural type Rhodonite* Pyroxmangite** Clinopyroxene Garnet Idealised formula VII( M 5) Mn VI( M 1–4) Mn 4 [ IV Si 5 O 15 ] VII( M 1–2) Mn VI( M 3–7) Mn 5 [ IV Si 7 O 21
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Chemical composition of vittinkiite from the collection of the Fersman Mine... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Table 2. Chemical composition of vittinkiite from the collection of the Fersman Mineralogical Museum RAS, our data. Catalogue Holotype: Vittinki (Vittinge), Finland New England Range, New South Wales, Australia Ridder Mine, NW Altai, Kazakhstan Sultanuizdag, Uzbekistan Nozhiy
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Infrared absorption spectra of ( a ) the holotype vittinkiite and ( b ) rho... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Fig. 2. Infrared absorption spectra of ( a ) the holotype vittinkiite and ( b ) rhodonite with the composition Ca 0.9 Mn 3.7 Mg 0.4 (Si 5 O 15 ) from Långban, Sweden.
Image
Comparative data for vittinkiite, pyroxmangite and four synthetic polymorph... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Table 7. Comparative data for vittinkiite, pyroxmangite and four synthetic polymorphs of MnSiO 3 . Structural type Rhodonite* Pyroxmangite** Clinopyroxene Garnet Idealised formula VII( M 5) Mn VI( M 1–4) Mn 4 [ IV Si 5 O 15 ] VII( M 1–2) Mn VI( M 3–7) Mn 5 [ IV Si 7 O 21
Image
Comparative data for vittinkiite, pyroxmangite and four synthetic polymorph... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Table 7. Comparative data for vittinkiite, pyroxmangite and four synthetic polymorphs of MnSiO 3 . Structural type Rhodonite* Pyroxmangite** Clinopyroxene Garnet Idealised formula VII( M 5) Mn VI( M 1–4) Mn 4 [ IV Si 5 O 15 ] VII( M 1–2) Mn VI( M 3–7) Mn 5 [ IV Si 7 O 21
Image
![The structure of (a, b) vittinkiite, (c, d) rhodonite and (e, f) ferrorhodonite viewed (a, c, e) orthogonal to [110] and (b, d, f) along [110]. M-site labels in (a) are also applicable to (c) and (e).](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/minmag/84/2/10.1180_mgm.2020.13/2/s_s0026461x20000134_fig26.jpeg?Expires=2147483647&Signature=AWv4iXMU1LVUdTVGEPMyu7psSudS4LQosxg0cAYu1cpLxhriRBfHnLtxeOVOvnUEg8Rv~cPrXYvGQF6V022pf8SIgtPn0d-~DiWcaw-m3ABhFFcz6LBFKO~ijHctQFPJ4YHjOu3Zh47-eSUIFdkvwLwKXS6DYL5RFHZrhgu3dLr4TtWwNtqYfRJitsfHFMC-wIMSj44AYthVz4~cw4kedtcxrv6HtMCrYqvsJTcwkyVNb8hiOvC1Wjv0O~OajU5Yzu5UyyRQLGO1awwVHkoq--pNbOKGdI-~0BtPezmu89T0XoxSn7AhcEmeWh87r2DvdM9WFCoRbVw7NQE3Y-Yq8w__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
The structure of ( a , b ) vittinkiite , ( c , d ) rhodonite and ( e ,... Available to Purchase
in A structure hierarchy for silicate minerals: chain, ribbon, and tube silicates
> Mineralogical Magazine
Published: 26 February 2020
Fig. 26. The structure of ( a , b ) vittinkiite , ( c , d ) rhodonite and ( e , f ) ferrorhodonite viewed ( a , c , e ) orthogonal to [110] and ( b , d , f ) along [110]. M -site labels in ( a ) are also applicable to ( c ) and ( e ).
Image
Ratios of the major metal cations in minerals of the rhodonite group ( a ) ... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
circles: blue – rhodonite; light purple – vittinkiite; deep purple – synthetic analogue of the end-member vittinkiite; red – ferrorhodonite; green – Zn-rich variety of rhodonite (‘fowlerite’); and grey – Mg-enriched variety of rhodonite. Other vittinkiite samples are shown by empty purple circles whereas
Image
Arrangement of M cations in chemically and structurally studied samples o... Available to Purchase
Published: 09 October 2019
) Ferrorhodonite Ferrorhodonite Mn 0.84 Fe 0.16 Mn 0.84 Fe 0.16 Mn 0.84 Fe 0.16 Fe 0.81 Mn 0.12 Mg 0.04 Zn 0.03 Ca 0.81 Mn 0.19 Shchipalkina et al. ( 2017 )*** Vittinkiite Rhodonite Mn , Mg Mn , Mg Mn , Mg Mn , Fe, Mg Mn , Ca Ohashi and Finger ( 1975 ) Vittinkiite
Image
Anhedral grains of mangani-eckermannite (Meck) closely intergrown with brau... Available to Purchase
in Mangani-eckermannite, NaNa 2 (Mg 4 Mn 3+ )Si 8 O 22 (OH) 2 , a new amphibole from Tanohata Mine, Iwate Prefecture, Japan
> Mineralogical Magazine
Published: 10 August 2023
Figure 2. Anhedral grains of mangani-eckermannite (Meck) closely intergrown with braunite (Bnt), albite (Ab) and vittinkiite (Vtk). Polished section. Back-scattered electron image.
Image
A 0.7 cm thick vein consisting of dark red mangani-eckermannite intergrown ... Available to Purchase
in Mangani-eckermannite, NaNa 2 (Mg 4 Mn 3+ )Si 8 O 22 (OH) 2 , a new amphibole from Tanohata Mine, Iwate Prefecture, Japan
> Mineralogical Magazine
Published: 10 August 2023
Figure 1. A 0.7 cm thick vein consisting of dark red mangani-eckermannite intergrown with black braunite, pink vittinkiite and colourless albite in a rock mainly consisting of colourless to pale salmon-reddish quartz. Holotype sample #5774/1, size: 2 × 1.5 × 1.5 cm. Photo: M. Milshina.
Image
![Cation ribbons and chains [Si5O15]∞ in the crystal structures of: (a) vittinkiite; (b) rhodonite; and (c) ferrorhodonite. The colour of polyhedra indicates the predominant cation: pink for Mn, grey for Ca and orange for Fe. For site labels and references see Table 2.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/minmag/83/6/10.1180_mgm.2019.65/2/s_s0026461x19000653_fig4.jpeg?Expires=2147483647&Signature=4r4t1pjJHT~wyfmhfAk-6PxnWPpKNX7v4h2qjLYcltU7QG2sF2eSU38npO-HSkAj6bdfxcOUGdg88vRRbXKFKA1CvFSxuwD6~K8ztM2g7F8hNqi5VG6Hlvvzfd1nIyCjb46CHOsG8d~k2RSq4ZTJy9qOYf0T9KzKc11qb3zyViurPG2lEjX7X771-PVfm7GR90Vm5ogsexToyq61fUQJIRIviogcVi~PCH6VSVm7IljKsYASEbKY5leWPVRk3plmbwkBw17HO4cgmpSECp9f87GnFsmXZfbT5j38NbEwA8sBrzzz2cbRRx64o5oJGfBPwpU-XpnZxPvJQuX7drHNJg__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Cation ribbons and chains [Si 5 O 15 ] ∞ in the crystal structures of: ( a... Available to Purchase
Published: 09 October 2019
Fig. 4. Cation ribbons and chains [Si 5 O 15 ] ∞ in the crystal structures of: ( a ) vittinkiite; ( b ) rhodonite; and ( c ) ferrorhodonite. The colour of polyhedra indicates the predominant cation: pink for Mn, grey for Ca and orange for Fe. For site labels and references see Table 2 .
Image
Projections of crystal structures of MnSiO 3 polymorphs: rhodonite type (v... Available to Purchase
in Vittinkiite, MnMn 4 [Si 5 O 15 ], a member of the rhodonite group with a long history: definition as a mineral species
> Mineralogical Magazine
Published: 25 September 2020
Fig. 4. Projections of crystal structures of MnSiO 3 polymorphs: rhodonite type (vittinkiite, this work) ( a ), pyroxmangite (Narita et al. , 1977 ) ( b ), clinopyroxene (Tokohami et al. , 1979 ) ( c ) and tetragonal garnet (Fujino et al. , 1986 ) ( d ). The unit cells are outlined.
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