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Marianoite

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Formula:
Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
System:
Monoclinic
Colour:
very pale yellow
Hardness:
6
Name:
Named for Anthony Nicola Mariano (b. 1930), in recognition of his contributions to the study of alkaline rocks and carbonatites.
The validity of marianoite as a distinct species in the wöhlerite group (cuspidine group) has been questioned, see Merlino & Mellini (2009) and Chakhmouradian & Mitchell (2009).

Classification of Marianoite

Approved 2005
9.BE.17

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
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http://www.mindat.org/min-28995.html
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Type Occurrence of Marianoite

General Appearance of Type Material:
flattened prismatic crystals to 0.3 mm in lenghth,with resorbed faces,
Associated Minerals at Type Locality:

Physical Properties of Marianoite

Vitreous, Greasy
Diaphaneity (Transparency):
Translucent
Comment:
Vitreous on cleavage, greasy on resorbed faces
Colour:
very pale yellow
Hardness (Mohs):
6
Cleavage:
Distinct/Good
Distinct on (010)
Fracture:
Irregular/Uneven
Density:
3.45 g/cm3 (Calculated)

Crystallography of Marianoite

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Cell Parameters:
a = 10.8459(15) Å, b = 10.2260(14) Å, c = 7.2727(10) Å
β = 109.332(3)°
Ratio:
a:b:c = 1.061 : 1 : 0.711
Unit Cell Volume:
V 761.1 ų
Twinning:
Lamellar in thin sections. {100}

Optical Data of Marianoite

Type:
Biaxial (-)
RI values:
nα = 1.700 nβ = 1.715 nγ = 1.725
2V:
Measured: 80° , Calculated: 78°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Non-pleochroic

Chemical Properties of Marianoite

Formula:
Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
Essential elements:
All elements listed in formula:

Relationship of Marianoite to other Species

Other Members of Group:
BaghdaditeCa3(Zr,Ti)(Si2O7)O2
BurpaliteNa2CaZr(Si2O7)F2
CuspidineCa4(Si2O7)(F,OH)2
Hiortdahlite(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
Janhaugite(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2
Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
NormanditeNaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF
WöhleriteNaCa2(Zr,Nb)(Si2O7)(O,OH,F)2
9.BE.02Wadsleyite(Mg,Fe2+)2(SiO4)
9.BE.05HennomartiniteSrMn23+(Si2O7)(OH)2 · H2O
9.BE.05LawsoniteCaAl2(Si2O7)(OH)2 · H2O
9.BE.05NoelbensoniteBaMn23+(Si2O7)(OH)2 · H2O
9.BE.05ItoigawaiteSrAl2(Si2O7)(OH)2 · H2O
9.BE.07IlvaiteCaFe22+Fe3+(Si2O7)O(OH)
9.BE.07ManganilvaiteCa(Mn2+,Fe2+)2Fe3+(Si2O7)O(OH)
9.BE.10SuoluniteCa2(H2Si2O7) · H2O
9.BE.12JaffeiteCa6(Si2O7)(OH)6
9.BE.15FresnoiteBa2Ti(Si2O7)O
9.BE.17BaghdaditeCa3(Zr,Ti)(Si2O7)O2
9.BE.17BurpaliteNa2CaZr(Si2O7)F2
9.BE.17CuspidineCa4(Si2O7)(F,OH)2
9.BE.17Hiortdahlite(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
9.BE.17Janhaugite(Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2
9.BE.17Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
9.BE.17Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
9.BE.17NormanditeNaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF
9.BE.17WöhleriteNaCa2(Zr,Nb)(Si2O7)(O,OH,F)2
9.BE.17Hiortdahlite INa4Ca8Zr2(Nb,Mn,Ti,Fe,Mg,Al)2(Si2O7)4O3F5
9.BE.20Mosandrite(◻,Ca,Na)3(Ca,REE)4Ti(Si2O7)2[H2O,OH,F]4 · H2O
9.BE.20Nacareniobsite-(Ce)Na3Ca3(Ce,La,Nd)Nb(Si2O7)2OF3
9.BE.22GötzeniteNaCa4(Ca,Na)2(Si2O7)2OF3
9.BE.22HainiteNa4Ca8(Ti,Zr,Mn)3(Si2O7)4F4
9.BE.22Rosenbuschite(Ca,Na)3(Zr,Ti)(Si2O7)OF
9.BE.22Kochite(Na,Ca)3Ca2(Mn,Ca)ZrTi(Si2O7)2(F,O)4
9.BE.23DovyreniteCa6Zr(Si2O7)2(OH)4
9.BE.25Barytolamprophyllite(Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F)
9.BE.25EricssoniteBaMn22+Fe3+(Si2O7)O(OH)
9.BE.25Lamprophyllite(Sr,K,Ba)2(Na,Ti,Mn2+,Fe3+)4Ti2(Si2O7)2O(O,OH,F)
9.BE.25Ericssonite-2OBaMn22+Fe3+(Si2O7)O(OH)
9.BE.25SeidozeriteNa8Mn22+Zr3Ti3(Si2O7)4O4F4
9.BE.25NabalamprophylliteNa3(Ba,Na)2Ti3(Si2O7)2O2(OH,F)2
9.BE.25Grenmarite(Na,Ca)4(Mn,Na)(Zr,Mn)2(Zr,Ti)(Si2O7)2(O,F)4
9.BE.25SchülleriteBa2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4
9.BE.25LileyiteBa2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2
9.BE.27MurmaniteNa2Ti2(Si2O7)O2 · 2H2O
9.BE.30EpistoliteNa2(Nb,Ti)2(Si2O7)O2 · nH2O
9.BE.32LomonosoviteNa5Ti2(Si2O7)(PO4)O2
9.BE.35VuonnemiteNa11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH)
9.BE.37SoboleviteNa13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3
9.BE.40InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4
9.BE.40PhosphoinneliteNa3Ba4Ti3(Si2O7)2(PO4,SO4)2O2F
9.BE.42YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)
9.BE.45QuadruphiteNa14Ca2Ti4(Si2O7)2(PO4)2O2F
9.BE.47PolyphiteNa5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2
9.BE.50BornemaniteNa6BaTi2Nb(Si2O7)2(PO4)O2(OH)F
9.BE.50ShkatulkaliteNa10Mn2+Ti3Nb3(Si2O7)6(OH)2F · 12H2O
9.BE.55BafertisiteBa(Fe2+,Mn2+)2Ti(Si2O7)O(F,OH)2
9.BE.55HejtmaniteBa(Mn2+,Fe2+)2Ti(Si2O7)O(OH,F)
9.BE.55Bykovaite(Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2O
9.BE.55Nechelyustovite(Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2O
9.BE.60Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
9.BE.65BusseniteNa2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3F
9.BE.67JinshajiangiteBaNaFe42+Ti2(Si2O7)2O2(OH)2F
9.BE.67PerraultiteBaNaMn42+Ti2 (Si2O7)2O2(OH)2F
9.BE.67SurkhobiteNaCaBa2Mn8Ti4(Si2O7)4O5F5
9.BE.70Karnasurtite-(Ce)(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O
9.BE.70Perrierite-(Ce)Ce4MgFe23+Ti2(Si2O7)2O8
9.BE.70Strontiochevkinite(Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8
9.BE.70Chevkinite-(Ce)(Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8
9.BE.70Polyakovite-(Ce)(Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8
9.BE.70RengeiteSr4ZrTi4(Si2O7)2O8
9.BE.70MatsubaraiteSr4Ti5(Si2O7)2O8
9.BE.70Dingdaohengite-(Ce)(Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe2+)2Ti2(Si2O7)2O8
9.BE.70Maoniupingite-(Ce)(Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8
9.BE.70Perrierite-(La)(La,Ce,Ca)4(Fe,Mn2+,Mg)Fe23+(Ti,Fe3+)2(Si2O7)2O8
9.BE.70UKI-2008-(SiO:SrTiZr)Sr4ZrTi4(Si2O7)2O8
9.BE.70Hezuolinite(Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8
9.BE.72FersmaniteCa4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3
9.BE.75BelkoviteBa3(Nb,Ti)6(Si2O7)2O12
9.BE.77NasonitePb6Ca4(Si2O7)3Cl2
9.BE.80KentrolitePb2Mn23+(Si2O7)O2
9.BE.80MelanotekitePb2Fe23+(Si2O7)O2
9.BE.82TilleyiteCa5(Si2O7)(CO3)2
9.BE.85KillalaiteCa6.4(H0.6Si2O7)2(OH)2
9.BE.87Stavelotite-(La)(La,Nd,Ca)3Mn32+Cu(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30
9.BE.90Biraite-(Ce)Ce2Fe2+(Si2O7)(CO3)
9.BE.92Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH)
9.BE.95BatisiviteBaV83+Ti6(Si2O7)O22

Other Names for Marianoite

Name in Other Languages:
Simplified Chinese:硅锆铌钙钠石

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 Marianoite

Reference List:
Chakhmouradian, A.R., Mitchell, R.H., Burns, P.C., Mikhailova, Yu., Reguir, E.P. (2008): Marianoite, a new member of the cuspidine group from the Prairie Lake silicocarbonatite, Ontario. Canadian Mineralogist, 46, 1023-1032.

Merlino, S. & Mellini, M. (2009): Marianoite, a new member of the cuspidine group from the Prairie Lake silicocarbonatite, Ontario: Discussion. Canadian Mineralogist, 47, 1275-1279.

Chakhmouradian, A.R. & Mitchell, R.H. (2009): Marianoite, a new member of the cuspidine group from the Prairie Lake silicocarbonatite, Ontario: Reply. Canadian Mineralogist, 47, 1275-1282.

Internet Links for Marianoite

Localities for Marianoite

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.
Canada (TL)
 
  • Ontario
    • Thunder Bay District
      • Killala Lake Area
Canadian Mineralogist 46,1023(2008)
Mineral and/or Locality  
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