Rhodonite Mineral Data

Rhodonite Mineral Data +

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General Rhodonite Information

Chemical Formula:

(Mn++,Fe++,Mg,Ca)SiO3

Composition:

Molecular Weight = 129.13 gm

Calcium 1.55 % Ca 2.17 % CaO

Magnesium 0.38 % Mg 0.62 % MgO

Manganese 38.29 % Mn 49.44 % MnO

Iron 0.86 % Fe 1.11 % FeO

Silicon 21.75 % Si 46.53 % SiO₂

Oxygen 37.17 % O

______ ______

100.00 % 99.88 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.9Fe²⁺_0.02Mg_0.02Ca_0.05SiO₃

Environment:

Hydrothermal, metamorphic and, metasomatic rocks.

IMA Status:

Valid Species (Pre-IMA) 1819

Locality:

Lauthental and Elbingerrode, Germany. Link to MinDat.org Location Data.

Name Origin:

From the Greek rhodos - "rose colored."

Synonym:

Fowlerite - Zn

ICSD 200452

PDF 13-138

Rhodonite Image

Images:

Rhodonite

Comments: Light red rhodonite and minor quartz.
Location: Chiurucu mine, Dos de Mayo, Peru. Scale: 3 x 3.5 cm.
© Fabre Minerals

Images:

Rhodonite Akatoreite

Comments: Brown akatoreite in pink rhodonite.
Location: Akatore Creek, Eastern Otago Peninsula, South Island, New Zealand. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Rhodonite Caryinite

Comments: Yellow crystalline caryinite with pink rhodonite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Rhodonite

Comments: Deep red blocky prismatic crystals of rhodonite to 3cm.
Location: Broken Hill mine, New South Wales, Australia. Scale: 6.5 x 5 x 4cm.
© Tom Loomis / Dakota Matrix

Rhodonite Crystallography

Axial Ratios:

a:b:c =0.872:1:1.5953

Cell Dimensions:

a = 6.68, b = 7.66, c = 12.22, Z = 10; alpha = 111.1°, beta = 86.016°, gamma = 93.203° V = 581.04 Den(Calc)= 3.69

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.772(1), 2.924(0.65), 2.98(0.65),

Forms:

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Forms: [ 0 1 0] [ 2 2 1] [ 1 1 0] [ 2 2 1] [ 1 0 0] [ 0 0 1]

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Crystal Structure:

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Peacor D R , Essene E J , Brown P E , Winter G A , American Mineralogist , 63 (1978) p.1137-1142, The crystal chemistry and petrogenesis of a magnesian rhodonite

View Additional jPOWD Structure files for Rhodonite
[1] [10] [11] [12] [13] [14] [15] [16] [2] [3] [4] [5] [6] [7] [8] [9]

Physical Properties of Rhodonite

Cleavage:

[110] Perfect, [110] Perfect

Color:

Pink, Rose red, Brownish red, Black, Yellow.

Density:

3.5 - 3.7, Average = 3.6

Diaphaniety:

Transparent to translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

6 - Orthoclase

Luminescence:

None.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Rhodonite

Gladstone-Dale:

CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1978,KPDmeas= 0.2027,KC= 0.2021

Optical Data:

Biaxial (+), a=1.711-1.738, b=1.714-1.741, g=1.724-1.751, bire=0.0130, 2V(Calc)=58, 2V(Meas)=58-73. Dispersion none.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Rhodonite

Electron Density:

r_electron=3.47 gm/cc
note: r_Rhodonite=3.60 gm/cc.

Fermion Index

Fermion Index = 0.01091
Boson Index = 0.98909

Photoelectric:

PE_Rhodonite= 11.12 barns/electron
U=PE_Rhodonite x r_electron= 38.61 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rhodonite is Not Radioactive

Rhodonite Classification

Dana Class:

65.4.1.1 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.4)with chains P=5

(65.4.1)Rhodonite group

65.4.1.1 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

65.4.1.2 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

65.4.1.3 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

65.4.1.4 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

65.4.1.5 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

65.4.1.6 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

65.4.1.7 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

65.4.1.8 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

Strunz Class:

VIII/F.27-10 VIII - Silicates

VIII/F - Inosilicates (chain and band) Five chains [Si5O15]10-

VIII/F.27 - Rhodonite - Inesite series

VIII/F.27-10 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

VIII/F.27-20 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

VIII/F.27-30 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

VIII/F.27-35 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

VIII/F.27-40 Santaclaraite CaMn4Si5O14(OH)2·(H2O) P1 1

VIII/F.27-50 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

VIII/F.27-60 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

VIII/F.27-70 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

VIII/F.27-80 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

VIII/F.27-90 Inesite Ca2Mn7Si10O28(OH)2·5(H2O) P1 1

Other Rhodonite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)

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Print or Cut-and-Paste your Rhodonite Specimen Label here :

Rhodonite

(Mn++,Fe++,Mg,Ca)SiO3
Dana No: 65.4.1.1 Strunz No: VIII/F.27-10
Locality:

Notes: