Ruizite Mineral Data

Ruizite Mineral Data +

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General Ruizite Information

Chemical Formula:

CaMn+++Si2O6(OH)·2(H2O)

Composition:

Molecular Weight = 300.22 gm

Calcium 13.35 % Ca 18.68 % CaO

Manganese 18.30 % Mn 26.29 % Mn₂O₃

Silicon 18.71 % Si 40.03 % SiO₂

Hydrogen 1.68 % H 15.00 % H₂O

Oxygen 47.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaMn³⁺Si₂O₆(OH)·2(H₂O)

Environment:

In veinlets and on fracture surfaces in metalimestones, formed during cooling of a high-temperature calc-silicate assemblage under oxidizing conditions

IMA Status:

Approved IMA 1977

Locality:

In the Christmas copper mine, Christmas, Gila Co., Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

For Joe Ana Ruiz, of Mammoth, Arizona, USA, collector of microscopic minerals, who discovered the mineral.

Synonym:

ICSD 30691

PDF 29-350

Ruizite Image

Images:

Ruizite Inesite

Comments: 1- 3 mm crystal spray of red orange ruizite in an exposed vug in pink inesite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Picture size 1 cm.
© John Veevaert

Images:

Ruizite

Comments: Deep reddish brown crystals of ruizite as radial, acicular sprays to 0.1mm.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Ruizite Crystallography

Axial Ratios:

a:b:c =1.9367:1:1.4635

Cell Dimensions:

a = 11.95, b = 6.17, c = 9.03, Z = 4; beta = 99.375° V = 656.90 Den(Calc)= 3.04

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 11.951(1), 4.19(0.7), 3.116(0.6),

Crystal Structure:

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Moore P B , Shen J , Araki T , American Mineralogist , 70 (1985) p.171-181, Crystal chemistry of the (M2)3+ phi2 sheet: Structural principles and crystal, structures of ruizite, macfallite and orientite

Physical Properties of Ruizite

Color:

Brown, Orange.

Density:

2.9

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

5 - Apatite

Streak:

apricot yellow

Optical Properties of Ruizite

Gladstone-Dale:

CI meas= 0.039 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.083 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2316,KPDmeas= 0.2428,KC= 0.2526

Optical Data:

Biaxial (-), a=1.663, b=1.715, g=1.734, bire=0.0710, 2V(Calc)=60, 2V(Meas)=60.

Calculated Properties of Ruizite

Electron Density:

r_electron=2.90 gm/cc
note: r_Ruizite=2.90 gm/cc.

Fermion Index

Fermion Index = 0.00915
Boson Index = 0.99085

Photoelectric:

PE_Ruizite= 6.94 barns/electron
U=PE_Ruizite x r_electron= 20.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ruizite is Not Radioactive

Ruizite Classification

Dana Class:

57.2.2.1 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups

(57.2)with [Si4O13] groups

(57.2.2)Dana Group

57.2.2.1 Ruizite CaMnSi2O6(OH)·2(H2O) P 2₁/c 2/m

Strunz Class:

VIII/C.35-10 VIII - Silicates

VIII/C - Sorosilicates, other group-silicates

VIII/C.35 - Ruizite - Akatoreite series

VIII/C.35-10 Ruizite CaMnSi2O6(OH)·2(H2O) P 2₁/c 2/m

VIII/C.35-15 Hubeite! Ca2MnFeSi4O12(OH)(H2O)2 P1 1

VIII/C.35-20 Akatoreite (Mn,Fe)9Al2Si8O24(OH)8 P1 1

Other Ruizite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Ruizite

CaMn+++Si2O6(OH)·2(H2O)
Dana No: 57.2.2.1 Strunz No: VIII/C.35-10
Locality:

Notes: