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Rengeite

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Formula:
Sr4ZrTi4(Si2O7)2O8
Colour:
Dark greenish brown
Lustre:
Adamantine
Hardness:
5 - 5½
Specific Gravity:
4.12 (Calculated)
Crystal System:
Monoclinic
Name:
Named for Mt. Renge and the Renge metamorphic belt where jadeitite deposits are found
Dimorph of:
Chevkinite Group.
See also strontiochevkinite and UKI-2008-(SiO:SrTiZr).

Found as a constitutent of lavender and green jade pebbles and boulders.

Structurally similar to hezuolinite; however, the O(1), O(2) and O(3) sites typical for hezuolinite are split into six sites in rengeite; also the Si(1)-O(7)-Si(2) angle is more bent in rengeite.


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Classification of RengeiteHide

Approved
Approval Year:
1998
9.BE.70

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
56.2.13.5

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination

Physical Properties of RengeiteHide

Adamantine
Transparency:
Transparent
Colour:
Dark greenish brown
Streak:
Pale greenish brown
Hardness:
5 - 5½ on Mohs scale
Density:
4.12 g/cm3 (Calculated)

Optical Data of RengeiteHide

Type:
Biaxial (+)
Dispersion:
r > v strong
Pleochroism:
Strong
Comments:
from pale geen to pale greenish brown

Chemical Properties of RengeiteHide

Formula:
Sr4ZrTi4(Si2O7)2O8
IMA Formula:
Sr4Ti4ZrO8(Si2O7)2

Crystallography of RengeiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 13.983(10) Å, b = 5.6722(9) Å, c = 11.996(10) Å
β = 114.215(7)°
Ratio:
a:b:c = 2.465 : 1 : 2.115
Unit Cell V:
867.74 ų
Z:
2
Comment:
given as P21/a, pseudo C2/m

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.05 (vvs)
2.99 (vs)
3.12 (s)
2.84 (s)
2.74 (s)
2.20 (s)

Type Occurrence of RengeiteHide

Synonyms of RengeiteHide

Other Language Names for RengeiteHide

German:Rengeit
Simplified Chinese:硅锆钛锶矿
Spanish:Rengeita

Relationship of Rengeite to other SpeciesHide

Other Members of this group:
Hezuolinite(Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8Mon. 2/m : B2/m
MatsubaraiteSr4Ti5(Si2O7)2O8Mon. 2/m : P21/b
Perrierite-(Ce)Ce4MgFe3+2Ti2(Si2O7)2O8
Perrierite-(La)(La,Ce,Ca)4(Fe,Mn2+,Mg)Fe3+2(Ti,Fe3+)2(Si2O7)2O8Mon. 2/m : P21/b
Strontiochevkinite(Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8Mon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Jadeite3 photos of Rengeite associated with Jadeite on mindat.org.
Itoigawaite2 photos of Rengeite associated with Itoigawaite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.BE.02Wadsleyite(Mg,Fe2+)2(SiO4)Orth.
9.BE.05HennomartiniteSrMn3+2(Si2O7)(OH)2 · H2OOrth.
9.BE.05LawsoniteCaAl2(Si2O7)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.BE.05NoelbensoniteBaMn3+2(Si2O7)(OH)2 · H2OOrth.
9.BE.05ItoigawaiteSrAl2(Si2O7)(OH)2 · H2OOrth.
9.BE.07IlvaiteCaFe3+Fe2+2(Si2O7)O(OH)Orth. mmm (2/m 2/m 2/m)
9.BE.07ManganilvaiteCaFe2+Fe3+Mn2+(Si2O7)O(OH)Mon. 2/m : P21/b
9.BE.10SuoluniteCa2(H2Si2O7) · H2OOrth.
9.BE.12JaffeiteCa6(Si2O7)(OH)6Trig. 3 : P3
9.BE.15FresnoiteBa2Ti(Si2O7)OTet.
9.BE.17BaghdaditeCa3(Zr,Ti)(Si2O7)O2Mon.
9.BE.17BurpaliteNa2CaZr(Si2O7)F2Mon.
9.BE.17CuspidineCa4(Si2O7)(F,OH)2Mon. 2/m : P21/b
9.BE.17Hiortdahlite(Na,Ca)2Ca4Zr(Mn,Ti,Fe)(Si2O7)2(F,O)4 Tric.
9.BE.17Janhaugite(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2Mon. 2/m : P21/m
9.BE.17Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2Mon. 2/m : P21/b
9.BE.17Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2Mon.
9.BE.17NormanditeNaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OFMon. 2/m : P21/b
9.BE.17WöhleriteNaCa2(Zr,Nb)(Si2O7)(O,OH,F)2Mon. 2 : P21
9.BE.17Hiortdahlite INa4Ca8Zr2(Nb,Mn,Ti,Fe,Mg,Al)2(Si2O7)4O3F5
9.BE.17MarianoiteNa2Ca4(Nb,Zr)2(Si2O7)2(O,F)4Mon. 2 : P21
9.BE.20Mosandrite-(Ce)(Ca3REE)[(H2O)2Ca0.50.5]Ti(Si2O7)2(OH)2(H2O)2Mon. 2/m : P21/b
9.BE.20Nacareniobsite-(Ce)NbNa3Ca3(Ce,REE )(Si2O7)2OF3Mon.
9.BE.22GötzeniteNaCa6Ti(Si2O7)2OF3Tric. 1 : P1
9.BE.22Hainite-(Y)Na2Ca4(Y,REE)Ti(Si2O7)2OF3Tric. 1 : P1
9.BE.22RosenbuschiteNa6Ca6Zr3Ti(Si2O7)4O2F6Tric. 1 : P1
9.BE.22KochiteNa3Ca2MnZrTi(Si2O7)2OF3Tric. 1 : P1
9.BE.23DovyreniteCa6Zr(Si2O7)2(OH)4Orth. mmm (2/m 2/m 2/m) : Pnnm
9.BE.25Barytolamprophyllite(Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F)Mon.
9.BE.25EricssoniteBaMn2+2Fe3+(Si2O7)O(OH)Mon. 2/m : B2/m
9.BE.25Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2Mon.
9.BE.25Ericssonite-2OBaMn2+2Fe3+(Si2O7)O(OH)Orth.
9.BE.25SeidozeriteNa4MnZr2Ti(Si2O7)2O2F2Mon.
9.BE.25NabalamprophylliteNa3(Ba,Na)2Ti3(Si2O7)2O2(OH,F)2Mon. 2/m
9.BE.25GrenmariteNa4MnZr3(Si2O7)2O2F2Mon. 2/m : P2/b
9.BE.25SchülleriteBa2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4Tric. 1 : P1
9.BE.25LileyiteBa2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2Mon. 2/m : B2/m
9.BE.27MurmaniteNa2Ti2(Si2O7)O2 · 2H2OTric.
9.BE.30EpistoliteNa2(Nb,Ti)2(Si2O7)O2 · nH2OTric.
9.BE.32LomonosoviteNa5Ti2(Si2O7)(PO4)O2Tric.
9.BE.35VuonnemiteNa11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH)Tric.
9.BE.37SoboleviteNa13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3Mon. m : Pb
9.BE.40InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric.
9.BE.40PhosphoinneliteNa3Ba4Ti3(Si2O7)2(PO4,SO4)2O2FTric.
9.BE.42YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)Tric. 1 : P1
9.BE.45QuadruphiteNa14Ca2Ti4(Si2O7)2(PO4)2O2FTric.
9.BE.47PolyphiteNa5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2Tric. 1 : P1
9.BE.50BornemaniteNa6BaTi2Nb(Si2O7)2(PO4)O2(OH)F Tric. 1 : P1
9.BE.50ShkatulkaliteNa10Mn2+Ti3Nb3(Si2O7)6(OH)2F · 12H2OMon.
9.BE.55BafertisiteBa2Fe2+4Ti2(Si2O72O2(OH)2F2Tric.
9.BE.55HejtmaniteBa2(Mn2+,Fe2+)4Ti2(Si2O7)2O2(OH)2F2Tric. 1
9.BE.55Bykovaite(Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2OMon. 2/m
9.BE.55Nechelyustovite(Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2OMon. 2/m : B2/m
9.BE.60Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2OMon.
9.BE.65BusseniteNa2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3FTric. 1 : P1
9.BE.67JinshajiangiteBaNaFe2+4Ti2(Si2O7)2O2(OH)2FMon. 2/m
9.BE.67PerraultiteBaNaMn2+4Ti2(Si2O7)2O2(OH)2FMon. 2/m : B2/m
9.BE.67SurkhobiteNaCaBa2Mn8Ti4(Si2O7)4O5F5
9.BE.70Karnasurtite-(Ce)(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O
9.BE.70Perrierite-(Ce)Ce4MgFe3+2Ti2(Si2O7)2O8
9.BE.70Strontiochevkinite(Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8Mon.
9.BE.70Chevkinite-(Ce)(Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8Mon.
9.BE.70Polyakovite-(Ce)(Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8Mon. 2/m : B2/m
9.BE.70MatsubaraiteSr4Ti5(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70Dingdaohengite-(Ce)(Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe2+)2Ti2(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70Maoniupingite-(Ce)(Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8Mon. 2/m : B2/m
9.BE.70Perrierite-(La)(La,Ce,Ca)4(Fe,Mn2+,Mg)Fe3+2(Ti,Fe3+)2(Si2O7)2O8Mon. 2/m : P21/b
9.BE.70UKI-2008-(SiO:SrTiZr)Sr4ZrTi4(Si2O7)2O8Orth. mmm (2/m 2/m 2/m) : Pbca
9.BE.70Hezuolinite(Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8Mon. 2/m : B2/m
9.BE.72FersmaniteCa4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3Tric.
9.BE.75BelkoviteBa3(Nb,Ti)6(Si2O7)2O12Hex.
9.BE.77NasonitePb6Ca4(Si2O7)3Cl2Hex.
9.BE.80KentrolitePb2Mn3+2(Si2O7)O2Orth. mmm (2/m 2/m 2/m) : Pbcm
9.BE.80MelanotekitePb2Fe3+2(Si2O7)O2Orth.
9.BE.82TilleyiteCa5(Si2O7)(CO3)2Mon.
9.BE.85KillalaiteCa6.4(H0.6Si2O7)2(OH)2Mon.
9.BE.87Stavelotite-(La)(La,Nd,Ca)3Mn2+3Cu(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30Trig. 3 : P31
9.BE.90Biraite-(Ce)Ce2Fe2+(Si2O7)(CO3)Mon. 2/m : P21/b
9.BE.92Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH)Trig. 3m : R3m
9.BE.95BatisiviteBaV3+8Ti6(Si2O7)O22Tric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

56.2.13.9Dingdaohengite-(Ce)(Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe2+)2Ti2(Si2O7)2O8Mon. 2/m : P21/b
56.2.13.10Hezuolinite(Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8Mon. 2/m : B2/m

Other InformationHide

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 RengeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Miyajima H., et al. (2001): "Rengeite, a new mineral, the Sr-Zr-analogue of perrierite from the Itoigawa-Ohmi district, Niigata Prefecture, central Japan". Mineralogical Magazine 65: 111-120.
Miyawaki, R., et al.:"The crystal structure of rengeite": J. of Mineralogical and Petrological Sciences 97, 7-12 (2002)
Mashima, H., Akai, J., Nakamuta, Y., Matsubara, S. (2008): Orthorhombic polymorph of rengeite from Ohmi region, central Japan. American Mineralogist, 93, 1153-1157.
Yang, Z., Giester, G., Ding, K. & Tillmanns, E. (2012): Hezuolinite, (Sr,REE)4Zr(Ti,Fe3+,Fe2+)2Ti2O8(Si2O7)2, a new mineral species of the chevkinite group from Saima alkaline complex, Liaoning Province, NE China. European Journal of Mineralogy: 24: 189-196.

Internet Links for RengeiteHide

Localities for RengeiteHide

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.

Locality ListHide

(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.
Japan
 
  • Honshu Island
    • Chubu Region
      • Niigata Prefecture
[Mineralogical Magazine(2001) 65, 111-120: MinRec 33:168]; Shi, G., Harlow, G. E., Wang, J., Wang, J., Ng, E., Wang, X., ... & Cui, W. (2012). Mineralogy of jadeitite and related rocks from Myanmar: a review with new data. European Journal of Mineralogy, 24(2), 345-370.
European Journal of Mineralogy (2002):1119-1128.
          • Ohmi
Miyajima et al. (2001) Mineralogical Magazine 65, 111-120.
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
Mikhailova, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Ivanyuk, G.Y., Men’shikov, Y.P., and Pakhomovsky, Y.A. (2007): Geology of Ore Deposits 49(7), 590-598.
Mineral and/or Locality  
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