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Ruizite

This page kindly sponsored by Chris Whitney-Smith
Joe Ruiz and Dick Thomssen
Formula:
Ca2Mn23+Si4O11(OH)4 · 2H2O
System:
Monoclinic
Colour:
orange, red-brown
Hardness:
5
Name:
Named after Mr. Joe Ana Ruiz (1924-2017), Pharmacist, Justice of the Peace, mineralogist and mineral collector of Mammoth, Arizona.
Isostructural with:
The structure (basing on recent refinement by Fendrich et al., 2016) is based on [010] chains consisting of edge-sharing MnO6 octa­hedra; the octahedra are surrounded by finite [Si4O11(OH)2] chains. Calcium atoms, [7]Ca, are located in cavities formed by the above atom groupings.


Classification of Ruizite

Approved
Approval Year:
1977
9.BJ.35

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
57.2.2.1

57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
2 : Insular Si3O10 and Larger Noncyclic Groups with [Si4O13] groups
14.18.23

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe

Physical Properties of Ruizite

Diaphaneity (Transparency):
Translucent
Colour:
orange, red-brown
Streak:
apricot yellow
Hardness (Mohs):
5
Density:
2.9(1) g/cm3 (Measured)    2.997 g/cm3 (Calculated)

Optical Data of Ruizite

Type:
Biaxial (-)
RI values:
nα = 1.663 nβ = 1.715 nγ = 1.734
2V:
Measured: 60° , Calculated: 60°
Max Birefringence:
δ = 0.071
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
strong r > v

Chemical Properties of Ruizite

IMA Formula:
Ca2Mn23+Si4O11(OH)4 · 2H2O
Mindat.org Formula:
Ca2Mn23+[Si4O11(OH)2](OH)2·2H2O

formerly reported as Ca2Mn3+2[(OH)2|H2Si4O13].2H2O
Elements listed in formula:

Crystallography of Ruizite

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Cell Parameters:
a = 9.0360(3) Å, b = 6.1682(2) Å, c = 11.9601(4) Å
β = 91.433(2)°
Ratio:
a:b:c = 1.465 : 1 : 1.939
Unit Cell Volume:
V 666.41 ų
Z:
2
Morphology:
Euhedral prismatic crystals to 1mm, spherules of radial acicular crystals.
Twinning:
Common on {100}
Comment:
Space group: A2; Fendrich et al. (2016) have shown that the first-study space group (A2) is more likely than the further reported one (C2/m)

Type Occurrence of Ruizite

Place of Conservation of Type Material:
Smithsonian 136689
Geological Setting of Type Material:
Cooling of a high temperature calc-silicate rock under oxidizing conditions.

Relationship of Ruizite to other Species

9.BJ.05OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
9.BJ.10RosenhahniteCa3Si3O8(OH)2
9.BJ.15TrabzoniteCa4Si3O9(OH)2
9.BJ.20Thalénite-(Y)Y3Si3O10F
9.BJ.25TiragalloiteMn42+As5+Si3O12(OH)
9.BJ.30MedaiteMn62+V5+Si5O18(OH)
9.BJ.40Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
9.BJ.40Ardennite-(V)Mn42+Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6
9.BJ.45KilchoaniteCa6(SiO4)(Si3O10)
9.BJ.50Kornerupine(Mg,Fe2+,Al,◻)10(Si,Al,B)5O21(OH,F)
9.BJ.50Prismatine(Mg,Al,Fe)6Al4(Si,Al)4(B,Si,Al)(O,OH,F)22
9.BJ.55ZunyiteAl13Si5O20(OH,F)18Cl
9.BJ.60HubeiteCa2Mn2+Fe3+Si4O12(OH) · 2H2O
9.BJ.65CassagnaiteCa4Fe43+V23+(OH)6O2(Si3O10)(SiO4)2
14.18.1NambuliteLiMn42+Si5O14(OH)
14.18.2NatronambuliteNaMn42+Si5O14(OH)
14.18.3ZakharoviteNa4Mn52+Si10O24(OH)6 · 6H2O
14.18.4NorrishiteKLiMn23+Si4O12
14.18.5ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2O
14.18.6AbswurmbachiteCu2+Mn63+O8(SiO4)
14.18.7DonpeacoriteMn2+Mg(SiO3)2
14.18.8KanoiteMn2+MgSi2O6
14.18.9CaryopiliteMn32+Si2O5(OH)4
14.18.10GonyeriteMn52+Fe3+(Si3Fe3+O10)(OH)8
14.18.11Tirodite
14.18.12ManganhumiteMn72+(SiO4)3(OH)2
14.18.13BustamiteCaMn2+Si2O6
14.18.14GlaucochroiteCaMn2+SiO4
14.18.15TruscottiteCa14Si24O58(OH)8 · 2H2O
14.18.16SantaclaraiteCaMn42+Si5O14(OH)2 · H2O
14.18.17FerrobustamiteCaFe2+Si2O6
14.18.18JohannseniteCaMn2+Si2O6
14.18.19NeltneriteCaMn63+O8(SiO4)
14.18.20OrlymaniteCa4Mn32+Si8O20(OH)6 · 2H2O
14.18.21InesiteCa2Mn72+Si10O28(OH)2 · 5H2O
14.18.22OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
14.18.24BostwickiteCaMn63+Si3O16 · 7H2O
14.18.25KittatinnyiteCa2(Mn2+,Mn3+)3Si2O8(OH)4 · 9H2O
14.18.26LithiomarsturiteLiCa2Mn22+Si5O14(OH)
14.18.27SeranditeNaMn22+Si3O8(OH)
14.18.28KvanefjelditeNa4CaSi6O14(OH)2
14.18.29MarsturiteNaCaMn32+Si5O14(OH)
14.18.30RaiteNa3Mn32+Ti0.25Si8O20(OH)2 · 10H2O
14.18.31RichteriteNa2CaMg5Si8O22(OH)2
14.18.32Byelorussite-(Ce)NaBa2Ce2Mn2+Ti2Si8O26(F,OH) · H2O
14.18.33DeeriteFe62+Fe33+(Si6O17)O3(OH)5
14.18.34CalderiteMn32+Fe23+(SiO4)3
14.18.35PyroxmangiteMn2+SiO3
14.18.36Dannemorite☐{Mn22+}{Fe52+}(Si8O22)(OH)2
14.18.37Neotocite(Mn2+,Fe2+)SiO3 · H2O
14.18.38BabingtoniteCa2Fe2+Fe3+Si5O14(OH)
14.18.39ManganbabingtoniteCa2Mn2+Fe3+Si5O14(OH)
14.18.40ÖrebroiteMn62+(Fe3+,Sb5+)2(SiO4)2(O,OH)6

Other Names for Ruizite

Name in Other Languages:
German:Ruizit
Russian:Руицит
Spanish:Ruizita

Other Information

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

References for Ruizite

Reference List:
American Mineralogist (1978): 63: 794-795.

Moore, P.B., J. Shen, and T. Araki (1985) Crystal chemistry of the 2∞[M 3+ 2ф2(TO4)2] sheet: structural principles and crystal structures of ruizite, macfallite and orientite. American Mineralogist (1985): 70: 171-181.

Tschermaks Mineralogische und Petrographische Mitteilungen: 33: 135-146.

Fendrich, K.V., Downs, R.T., Origlieri, M.J. (2016): Redetermination of ruizite, Ca2Mn3+2[Si4O11(OH)2](OH)2·2H2O. Acta Crystallographica: E72: 959-963; http://forum.amiminerals.it/viewtopic.php?f=5&t=12870 (2016)

Internet Links for Ruizite

mindat.org URL:
https://www.mindat.org/min-3476.html
Please feel free to link to this page.

Localities for Ruizite

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Italy
 
  • Liguria
    • La Spezia Province
      • Vara Valley
        • Borghetto Vara
Balestra, C., Kolitsch, U., Blass, G., Callegari, A.M., Boiocchi, M., Armellino, G., Ciriotti, M.E., Ambrino, P. Bracco, R. (2009): Mineralogia ligure 2007-2008: novità caratterizzate dal Servizio UK dell’AMI. Micro, 1-2009, 78-99.
South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;
      • Kuruman
        • N'Chwaning Mines
Y.Okazaki collection
Minerals of South Africa
USA (TL)
 
  • Arizona
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Christmas area
            • Christmas
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 231, 358. ; Bob Meyer (2012) Micro Mineral Collector. Friends of Mineralogy National Newsletter 42:10-13
  • Pennsylvania
    • Lebanon Co.
      • Cornwall Borough (Cornwall)
Kearns, L.E. & Kearns, C.A. (2008) Mineral News, 24, #1, 8-9.
Mineral and/or Locality  
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