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Rhodonite

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Formula:
MnSiO
 
3
System:TriclinicColour:Red, pink, brownish-red, ...
Lustre:Vitreous, PearlyHardness:5½ - 6½
Name:Named in 1819 by Christoph Friedrich Jasche from the Greek ρόδον, "rose", referring to its color.


Often contains minor Ca.
Pyroxmangite of MnSiO3 composition is the high-pressure, low-temperature polymorph with respect to rhodonite of the same composition (Maresch & Mottana, 1976).

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Classification of Rhodonite

IMA status:Approved
Strunz 8th edition ID:8/F.27-10
Nickel-Strunz 10th (pending) edition ID:9.DK.05

9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains
Dana 8th edition ID:65.4.1.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
4 : Single-Width Unbranched Chains, W=1 with chains P=5
Hey's CIM Ref.:14.17.1

14 : Silicates not Containing Aluminum
17 : Silicates of Mn
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Type Occurrence of Rhodonite

Type Locality:Kaiser Franz Mine (König Wilhelm Mine), Schävenholz (Schebenholz; Schäbenholz), Elbingerode, Harz, Saxony-Anhalt, Germany
Year of Discovery:1819

Occurrences of Rhodonite

Geological Setting:Manganese deposits formed by hydrothermal, contact or regional metamorphic, and sedimentary processes.

Physical Properties of Rhodonite

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Transparent, Translucent
Comment:Somewhat pearly on cleavage
Colour:Red, pink, brownish-red, gray.
Streak:White
Hardness (Mohs):5½ - 6½
Cleavage:Perfect
Perfect on {110} & {110}
Good on {001}
Fracture:Irregular/Uneven, Conchoidal
Density (measured):3.57 - 3.76 g/cm3
Density (calculated):3.726 g/cm3

Crystallography of Rhodonite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Cell Parameters:a = 9.758Å, b = 10.499Å, c = 12.205Å
α = 108.58°, β = 102.92°, γ = 82.52°
Ratio:a:b:c = 0.929 : 1 : 1.162
Unit Cell Volume:V 1,152.86 ų (Calculated from Unit Cell)
Z:20
Morphology:Crystals rough, typically tabular
Twinning:Lamellar, with {010} as composition plane.
Comment:Non-standard space-group setting C-1.
Crystal Atlas:
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Rhodonite no.30 - Goldschmidt (1913-1926)
Rhodonite no.49 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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Opaque | Translucent | Transparent

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Epitaxial Relationships of Rhodonite

Epitaxial Minerals:
Tiragalloite
Mn
2+
4
(HAsSi
 
3
O
 
13
)
Marsturite
NaCaMn
 
3
Si
 
5
O
 
14
(OH)
Epitaxi Comments:(001)[100]mar // (001)[100]rho ; Dunn & Leavens (1986)
(010)[001]tir // (010)[100]rho ; Roth & Meisser (2011)
X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Rhodonite

Type:Biaxial (+)
RI values: nα = 1.711 - 1.738 nβ = 1.714 - 1.741 nγ = 1.724 - 1.751
2V:Measured: 58° to 73°, Calculated: 58°
Maximum Birefringence:δ = 0.013

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r < v
Pleochroism:Weak
Comments:X= yellowish red
Y= pinkish red
Z= pale yellowish red

Chemical Properties of Rhodonite

Formula:
MnSiO
 
3
Simplified for copy/paste:MnSiO3
Essential elements:Mn, O, Si
All elements listed in formula:Mn, O, Si
Common Impurities:Al,Ca,Fe,Zn

Relationship of Rhodonite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DK.05Babingtonite
Ca
 
2
(Fe,Mn)FeSi
 
5
O
 
14
(OH)
9.DK.05Lithiomarsturite
LiCa
 
2
Mn
 
2
Si
 
5
O
 
14
(OH)
9.DK.05Manganbabingtonite
Ca
 
2
(Mn,Fe)FeSi
 
5
O
 
14
(OH)
9.DK.05Marsturite
NaCaMn
 
3
Si
 
5
O
 
14
(OH)
9.DK.05Nambulite
(Li,Na)Mn
 
4
Si
 
5
O
 
14
(OH)
9.DK.05Natronambulite
(Na,Li)(Mn,Ca)
 
4
Si
 
5
O
 
14
OH
9.DK.05Scandiobabingtonite
Ca
 
2
(Fe
2+
 
,Mn)ScSi
 
5
O
 
14
(OH)
9.DK.05Fowlerite
9.DK.10Santaclaraite
CaMn
 
4
[Si
 
5
O
 
14
OH](OH) · H
 
2
O
9.DK.15Saneroite
Na
 
2
(Mn,Mn)
 
10
Si
 
11
VO
 
34
(OH)
 
4
9.DK.20Hellandite-(Y)
(Ca,Y)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
9.DK.20Tadzhikite-(Ce)
(Ca,Ce)
 
4
(Ce,Y)
 
2
(Ti
4+
 
,Fe
3+
 
,Al)[B
 
4
Si
 
4
O
 
22
](OH)
 
2
9.DK.20Mottanaite-(Ce)
Ca
 
4
(CeCa)AlBe
 
2
(Si
 
4
B
 
4
O
 
22
)O
 
2
9.DK.20Ciprianiite
Ca
 
4
[(Th,U)(REE)]Al◻
 
2
(Si
 
4
B
 
4
O
 
22
)(OH,F)
 
2
9.DK.20Hellandite-(Ce)
(Ca,Ce)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
Related Minerals - Hey's Index Grouping:

- +
14.17.2Tephroite
Mn
2+
2
SiO
 
4
14.17.3Braunite
Mn
2+
 
Mn
3+
6
(SiO
 
4
)O
 
8
14.17.4Alleghanyite
Mn
2+
5
(SiO
 
4
)
 
2
(OH)
 
2
14.17.5Ribbeite
(Mn
2+
 
,Mg)
 
5
(SiO
 
4
)
 
2
(OH)
 
2
14.17.6Leucophoenicite
Mn
2+
7
(SiO
 
4
)
 
3
(OH)
 
2
14.17.7Jerrygibbsite
Mn
2+
9
(SiO
 
4
)
 
4
(OH)
 
2
14.17.8Bementite
Mn
 
7
Si
 
6
O
 
15
(OH)
 
8
14.17.9Parsettensite
K
 
1.2
Mn
 
8
(Si,Al)
 
12
O
 
26
(OH)
 
10
14.17.10Yofortierite
Mn
 
5
Si
 
8
O
 
20
(OH)
 
2
· 8-9H
 
2
O

Other Names for Rhodonite

Synonyms:
Cummingtonite (of Rammelsberg)HermanniteHydropiteKapnikite (of Huot)Mangan-Amphibole
Manganolite PaisbergitePajsbergitePeach Blossom JadePink MarbleRhodoarsenian
Vermilion Jade
Other Languages:
Dutch:Rhodoniet
Finnish:Rodoniitti
French:Rhodonite
German:Rhodonit
Hermannit
Hydropit
Kieselmangan
Klipsteinit
Mangankiesel
Pajsbergit
Rother Braunstein
Italian:Rhodonite
Japanese:ばら輝石
バラ輝石
Lithuanian:Rodonitas
Polish:Rodonit
Portuguese:Rodonita
Russian:Родонит
Simplified Chinese:蔷薇辉石
Slovak:Rodonit
Spanish:Rodonita
Hermannita
Hydropita
Pajsbergita
Rhodonita
Traditional Chinese:薔薇輝石
Ukrainian:Родоніт
Varieties:
DyssniteFowleriteHsihutsuniteOrlets

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Rhodonite

Reference List:

- +
Acta Crystallographica:: 12: 182-187.

Peacor, D.R. and N. Niizeki (1963): The redetermination and refinement of the crystal structure of rhodonite, (Mn,Ca)SiO3. Zeitschrift für Kristallographie: 119, 98-116.

H. Momoi (1964) Mineralogical study of rhodonites in Japan... Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 15, #1, 39-63 (in english).

Ohashi, Y. and Finger, L.W. (1975) Pyroxenoids. A comparison of refined structures of rhodonite and pyroxmangite. Carnegie Institution Washington Year Book: 74: 564-569.

Maresch, W.V. and Mottana, A. (1976) The pyroxmangite-rhodonite transformation for the MnSiO3 composition. Contributions to Mineralogy and Petrology: 55: 69-79.

Narita, H., Koto, K., and Morimoto, N. (1977) The crystal structures of MnSiO3 polymorphs (rhodonite- and pyroxmangite-type). Mineralogical Journal of Sapporo: 8: 329-342.

American Mineralogist (1988): 73: 798-808.

Robie, R.A., Huebner, J.S., and Hemingway, B.S. (1995) Heat capacities and thermodynamic properties of braunite (Mn7SiO12) and rhodonite (MnSiO3). American Mineralogist: 80: 560-575.

Deer, W.A., Howie, R.A. and Zussman, J. (1997): Vol. 2A: 586-599.

Cook, R.B. (2005) "Connoisseur's Choice: Rhodonite." Rocks & Minerals 80: 264-269.

Best Localities for Rhodonite

Best of Species:Rhodonite

Internet Links for Rhodonite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Rhodonite details from Handbook of Mineralogy (PDF)
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  • Localities for Rhodonite

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