Cuspidine (original) (raw)
Colour:
Colorless, tan, light brown, pale red.
Lustre:
Vitreous, Sub-Vitreous, Waxy
Specific Gravity:
2.97 - 2.99
Crystal System:
Monoclinic
Name:
Named by Arcangelo Scacchi in 1876 from the Greek "cuspis," for a spear, the characteristic shape of the twinned crystals.
A sorosilicate belonging to the wöhlerite group. It was first found and described from ejected blocks of metamorphosed limestone at Mount Somma, Somma-Vesuvius complex, Italy. It also occurs in skarns, tuff ejecta, calc-silicate xenoliths, alkaline rocks and natrocarbonatite.
The F analogue of 'Chlorocuspidine'.
May be associated with pyrometamorphism due to coal fires (e.g., Kruszewski, 2006). As such, it may bear some germanium.
Vitreous, Sub-Vitreous, Waxy
Colour:
Colorless, tan, light brown, pale red.
Cleavage:
Distinct/Good
good on {100}, distinct on {110}, also {122} poor
Fracture:
Irregular/Uneven
Density:
2.97 - 2.99 g/cm3 (Measured) 2.98 g/cm3 (Calculated)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 10.906 Å, b = 10.521 Å, c = 7.518 Å
β = 109.90°
Ratio:
a:b:c = 1.037 : 1 : 0.715
Unit Cell V:
811.12 ų (Calculated from Unit Cell)
Morphology:
Colorless to tan masses, occasionally pale red. Crystals have a steep termination.
Twinning:
Simple, lamellar, polysynthetic on {100}.
Comment:
Refinement data from Saburi et al (1977)
| 9.BE. | Paralomonosovite | Na6◻4Ti4(Si2O7)2[PO3OH][PO2(OH)2]O2(OF) | Tric. 1 : _P_1 |
|---|---|---|---|
| 9.BE. | Cámaraite | Ba3Na(Fe2+,Mn)8Ti4(Si2O7)4O4(OH,F)7 | Tric. 1 |
| 9.BE. | Christofschäferite-(Ce) | Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8 | Mon. 2/m : _P_21/m |
| 9.BE. | Bobshannonite | Na2KBa(Mn,Na)8(Nb,Ti)4(Si2O7)4O4(OH)4(O,F)2 | Tric. |
| 9.BE. | Calciomurmanite | (Na,◻)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4 | Tric. 1 : _P_1 |
| 9.BE. | Batievaite-(Y) | Y2Ca2Ti(Si2O7)2(OH)2(H2O)4 | Tric. 1 : _P_1 |
| 9.BE. | Delhuyarite-(Ce) | Ce4Mg(Fe3+,W)3◻(Si2O7)2O6(OH)2 | Mon. 2/m : _B_2/m |
| 9.BE.X | Asimowite | Fe2+4O(Si2O7) | Orth. m m m _(_2/_m_2/_m_2/m ) : I m m a |
| 9.BE. | Moxuanxueite | NaCa6Zr(Si2O7)2OF3 | Tric. 1 : _P_1 |
| 9.BE. | Alexkuznetsovite-(Ce) | Ce2Mn(CO3)(Si2O7) | Mon. 2/m : _P_21/b |
| 9.BE. | Biraite-(La) | La2Fe2+(CO3)(Si2O7) | Mon. 2/m : _P_21/b |
| 9.BE. | Zinkgruvanite | Ba4Mn2+4Fe3+2(Si2O7)2(SO4)2O2(OH)2 | Tric. 1 : _P_1 |
| 9.BE. | Madeiraite | Na2Ca2Fe2Zr2(Si2O7)2O2F2 | Mon. 2/m : _P_21/b |
| 9.BE. | Bortolanite | Ca2(Ca1.5Zr0.5)Na(NaCa)Ti(Si2O7)2(OF)F2 | Tric. 1 : _P_1 |
| 9.BE. | Nacareniobsite-(Y) | Na3Ca3YNb(Si2O7)2OF3 | Mon. 2/m : _P_21/b |
| 9.BE. | Pilanesbergite | Na2Ca2Fe2Ti2(Si2O7)2O2F2 | Mon. 2/m : _P_21/b |
| 9.BE. | Alfredcasparite | Sr2TiO(Si2O7) | Tet. 4_m_ m : P_4_b m |
| 9.BE.02 | Wadsleyite | Mg4O(Si2O7) | Orth. m m m _(_2/_m_2/_m_2/m ) : I m m a |
| 9.BE.02 | Ohtaniite | Mg3(Si0.5◻0.5)Si2O8 | Orth. m m m _(_2/_m_2/_m_2/m ) : I m m a |
| 9.BE.05 | Hennomartinite | SrMn3+2(Si2O7)(OH)2 · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BE.05 | Lawsonite | CaAl2(Si2O7)(OH)2 · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BE.05 | Noelbensonite | BaMn3+2(Si2O7)(OH)2 · H2O | Orth. m _m_2 |
| 9.BE.05 | Itoigawaite | SrAl2(Si2O7)(OH)2 · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BE.05 | Cortesognoite | CaV2(Si2O7)(OH)2 · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BE.07 | Ilvaite | CaFe3+Fe2+2(Si2O7)O(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.BE.07 | Manganilvaite | CaFe2+Fe3+Mn2+(Si2O7)O(OH) | Mon. 2/m : _P_21/b |
| 9.BE.07 | Amamoorite | CaMn2+2Mn3+(Si2O7)O(OH) | Mon. 2/m : _P_21/b |
| 9.BE.10 | Suolunite | Ca2(H2Si2O7) · H2O | Orth. m _m_2 : F d _d_2 |
| 9.BE.12 | Jaffeite | Ca6(Si2O7)(OH)6 | Trig. 3 : _P_3 |
| 9.BE.15 | Fresnoite | Ba2Ti(Si2O7)O | Tet. 4_m_ m : P_4_b m |
| 9.BE.17 | Baghdadite | Ca6Zr2(Si2O7)2O4 | Mon. 2/m : _P_21/b |
| 9.BE.17 | Burpalite | Na2CaZr(Si2O7)F2 | Mon. 2/m : _P_21/b |
| 9.BE.17 | Hiortdahlite | Na2Ca4(Ca0.5Zr0.5)Zr(Si2O7)2OF3 | Tric. 1 : _P_1 |
| 9.BE.17 | Janhaugite | (Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2 | Mon. 2/m : _P_21/m |
| 9.BE.17 | Låvenite | Na2Ca2Mn2Zr2(Si2O7)2O2F2 | Mon. 2/m : _P_21/b |
| 9.BE.17 | Niocalite | (Ca,Nb)4(Si2O7)(O,OH,F)2 | Mon. m |
| 9.BE.17 | Normandite | NaCa(Mn,Fe)(Ti,Nb,Zr)(Si2O7)OF | Mon. 2/m : _P_21/b |
| 9.BE.17 | Wöhlerite | Na2Ca4ZrNb(Si2O7)2O3F | Mon. 2 : _P_21 |
| 9.BE.20 | Mosandrite-(Ce) | (Ca3REE)[(H2O)2Ca0.5◻0.5]Ti(Si2O7)2(OH)2(H2O)2 | Mon. 2/m : _P_21/b |
| 9.BE.20 | Nacareniobsite-(Ce) | Na3Ca3(Ce,REE)Nb(Si2O7)2OF3 | Mon. 2/m : _P_21/b |
| 9.BE.20 | Rinkite-(Ce) | (Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2 | Mon. 2/m : _P_21/b |
| 9.BE.20 | Roumaite | (Ca,Na,REE,◻)7(Nb,Ti)[Si2O7]2OF3 | Mon. m : B b |
| 9.BE.20 | Rinkite-(Y) | Na2Ca4YTi(Si2O7)2OF3 | Mon. 2/m : _P_21/b |
| 9.BE.22 | Götzenite | NaCa6Ti(Si2O7)2OF3 | Tric. 1 : _P_1 |
| 9.BE.22 | Hainite-(Y) | Na2Ca4(Y,REE)Ti(Si2O7)2OF3 | Tric. 1 : _P_1 |
| 9.BE.22 | Rosenbuschite | Na6Ca6Zr3Ti(Si2O7)4O2F6 | Tric. 1 : _P_1 |
| 9.BE.22 | Kochite | Na3Ca2MnZrTi(Si2O7)2OF3 | Tric. 1 : _P_1 |
| 9.BE.22 | Fogoite-(Y) | Na3Ca2Y2Ti(Si2O7)2OF3 | Tric. 1 : _P_1 |
| 9.BE.23 | Dovyrenite | Ca6Zr(Si2O7)2(OH)4 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 9.BE.25 | Barytolamprophyllite | (Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F) | Mon. |
| 9.BE.25 | Ericssonite | BaMn2+2Fe3+(Si2O7)O(OH) | Mon. 2/m : _B_2/m |
| 9.BE.25 | Lamprophyllite | (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2 | Mon. 2/m |
| 9.BE.25 | Ericssonite-2O | BaMn2+2Fe3+(Si2O7)O(OH) | Orth. |
| 9.BE.25 | Seidozerite | Na4MnZr2Ti(Si2O7)2O2F2 | Mon. 2/m : _P_2/b |
| 9.BE.25 | Nabalamprophyllite | (BaNa)Ti2Na3Ti(Si2O7)2O2(OH)2 | Mon. 2/m : _P_2/m |
| 9.BE.25 | Grenmarite | Na4MnZr3(Si2O7)2O2F2 | Mon. 2/m : _P_2/b |
| 9.BE.25 | Schüllerite | Ba2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4 | Tric. 1 : _P_1 |
| 9.BE.25 | Kazanskyite | BaNa3Ti2Nb(Si2O7)2O2(OH)2(H2O)4 | Tric. 1 : _P_1 |
| 9.BE.25 | Lileyite | Ba2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2 | Mon. 2/m : _B_2/m |
| 9.BE.25 | Emmerichite | Ba2Na(Na,Fe2+)2(Fe3+,Mg)Ti2(Si2O7)2O2F2 | Mon. 2/m : _B_2/m |
| 9.BE.25 | Saamite | Ba◻Na3Ti2Nb(Si2O7)2O2(OH)F(H2O)2 | Tric. 1 : _P_1 |
| 9.BE.25 | Fluorlamprophyllite | Na3(SrNa)Ti3(Si2O7)2O2F2 | Mon. 2/m : _B_2/m |
| 9.BE.25 | Fluorbarytolamprophyllite | (Ba,Sr)2[(Na,Fe2+)3(Ti,Mg)F2][Ti2(Si2O7)2O2] | Mon. 2/m : _B_2/m |
| 9.BE.27 | Murmanite | Na2Ti2(Si2O7)O2 · 2H2O | Tric. 1 : _P_1 |
| 9.BE.27 | Vigrishinite | NaZnTi4(Si2O7)2O3(OH)(H2O)4 | Tric. 1 : _P_1 |
| 9.BE.27 | Kolskyite | CaNa2Ti4(Si2O7)2O4(H2O)7 | Tric. 1 : _P_1 |
| 9.BE.27 | Selivanovaite | NaFe3+Ti4(Si2O7)2O4(H2O)4 | Tric. 1 : _P_1 |
| 9.BE.30 | Epistolite | (Na◻)Nb2Na3Ti(Si2O7)2O2(OH)2(H2O)4 | Tric. 1 : _P_1 |
| 9.BE.32 | Lomonosovite | Na5Ti2(Si2O7)(PO4)O2 | Tric. 1 : _P_1 |
| 9.BE.35 | Vuonnemite | Na11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH) | Tric. |
| 9.BE.37 | Sobolevite | Na13Ca2Mn2Ti3(Si2O7)2(PO4)4O3F3 | Mon. m : P b |
| 9.BE.40 | Innelite | Ba4Ti2Na(NaMn2+)Ti(Si2O7)2[(SO4)(PO4)]O2[O(OH)] | Tric. 1 : _P_1 |
| 9.BE.40 | Phosphoinnelite | Na3Ba4Ti3(Si2O7)2(PO4,SO4)2O2F | Tric. |
| 9.BE.42 | Yoshimuraite | Ba2Mn2Ti(Si2O7)(PO4)O(OH) | Tric. 1 : _P_1 |
| 9.BE.45 | Quadruphite | Na6Na2(CaNa)2Na2Ti2Na2Ti2(Si2O7)2(PO4)4O4F2 | Tric. 1 : _P_1 |
| 9.BE.47 | Polyphite | Na5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2 | Tric. 1 : _P_1 |
| 9.BE.50 | Bornemanite | Na6BaTi2Nb(Si2O7)2(PO4)O2(OH)F | Tric. 1 : _P_1 |
| 9.BE.50 | Shkatulkalite | Na2Nb2Na3Ti(Si2O7)2O2(FO)(H2O)4(H2O)3 | Tric. 1 : _P_1 |
| 9.BE.55 | Bafertisite | Ba2Fe2+4Ti2(Si2O7)2O2(OH)2F2 | Tric. |
| 9.BE.55 | Hejtmanite | Ba2Mn2+4Ti2(Si2O7)2O2(OH)2F2 | Tric. 1 |
| 9.BE.55 | Bykovaite | (Ba,Na,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(H2O,F,OH)2 · 3.5H2O | Mon. 2/m |
| 9.BE.55 | Nechelyustovite | (Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2O | Mon. 2/m : _B_2/m |
| 9.BE.60 | Delindeite | (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O | Mon. 2/m : _B_2/m |
| 9.BE.62 | Orthochevkinite | (Ce,La,Ca,Na,Th)4(Fe2+,Mg)2(Ti,Fe3+)3Si4O22 | Orth. |
| 9.BE.62 va | Strontium Perrierite | (Ce,Sr,La,Ca)4Fe2+(Ti,Zr,Fe)2Ti2(Si2O7)2O8 | |
| 9.BE.62 | Chevkinite-(Nd) | (Nd,REE)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8 ? | |
| 9.BE.62 | Perrierite-(Nd) | Nd4MgFe3+2Ti2(Si2O7)2O8 ? | |
| 9.BE.65 | Bussenite | Na2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3F | Tric. 1 : _P_1 |
| 9.BE.67 | Jinshajiangite | BaNaFe2+4Ti2(Si2O7)2O2(OH)2F | Tric. 1 : _P_1 |
| 9.BE.67 | Perraultite | BaNaMn2+4Ti2(Si2O7)2O2(OH)2F | Tric. 1 |
| 9.BE.70 | Karnasurtite-(Ce) | (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O | Amor. |
| 9.BE.70 | Perrierite-(Ce) | Ce4MgFe3+2Ti2(Si2O7)2O8 | Mon. 2/m : _P_21/b |
| 9.BE.70 | Strontiochevkinite | (Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8 | Mon. 2/m : _P_21/b |
| 9.BE.70 | Chevkinite-(Ce) | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 | Mon. 2/m : _P_21/b |
| 9.BE.70 | Polyakovite-(Ce) | (Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8 | Mon. 2/m : _B_2/m |
| 9.BE.70 | Rengeite | Sr4ZrTi4(Si2O7)2O8 | Mon. 2/m : _P_21/b |
| 9.BE.70 | Matsubaraite | Sr4Ti5(Si2O7)2O8 | Mon. 2/m : _P_21/b |
| 9.BE.70 | Dingdaohengite-(Ce) | (Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe3+)2Ti2(Si2O7)2O8 | Mon. 2/m : _P_21/b |
| 9.BE.70 | Maoniupingite-(Ce) | (Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8 | Mon. 2/m : _B_2/m |
| 9.BE.70 | Perrierite-(La) | (La,Ce,Ca)4(Fe2+,Mn)(Ti,Fe3+,Al)4[(Si2O7)O4]2 | Mon. 2/m : _P_21/b |
| 9.BE.70 | UM2008-53-SiO:SrTiZr | Sr4ZrTi4(Si2O7)2O8 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.BE.70 | Hezuolinite | (Sr,REE)4Zr(Ti,Fe3+)4(Si2O7)2O8 | Mon. 2/m : _B_2/m |
| 9.BE.72 | Fersmanite | Ca4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3 | Tric. |
| 9.BE.75 | Belkovite | Ba3(Nb,Ti)6(Si2O7)2O12 | Hex. 6_m_2 : P_62_m |
| 9.BE.77 | Nasonite | Pb6Ca4(Si2O7)3Cl2 | Hex. 6/m : _P_63/m |
| 9.BE.80 | Kentrolite | Pb2Mn3+2(Si2O7)O2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c m |
| 9.BE.80 | Melanotekite | Pb2Fe3+2(Si2O7)O2 | Orth. 222 : _C_2221 |
| 9.BE.82 | Tilleyite | Ca5(Si2O7)(CO3)2 | Mon. 2/m : _P_21/b |
| 9.BE.82 | Alexkuznetsovite-(La) | La2Mn(CO3)(Si2O7) | Mon. 2/m : _P_21/b |
| 9.BE.85 | Killalaite | Ca6.4(H0.6Si2O7)2(OH)2 | Mon. 2/m : _P_21/m |
| 9.BE.87 | Stavelotite-(La) | (La,Nd,Ca)3Mn2+3Cu(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30 | Trig. 3 : _P_31 |
| 9.BE.90 | Biraite-(Ce) | Ce2Fe2+(Si2O7)(CO3) | Mon. 2/m : _P_21/b |
| 9.BE.90 | Magnesiorowlandite-(Y) | Y4(Mg,Fe)(Si2O7)2F2 | Tric. 1 : _P_1 |
| 9.BE.92 | Cervandonite-(Ce) | (Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH) | Trig. 3_m_ : R_3_m |
| 9.BE.92 | Chirvinskyite | (Na,Ca)13(Fe,Mn,◻)2(Ti,Zr)5(Si2O7)4(OH,O)12 · 2H2O | Tric. 1 : _P_1 |
| 9.BE.95 | Batisivite | BaV3+8Ti6(Si2O7)O22 | Tric. 1 : _P_1 |
| 9.BE.95 | Rusinovite | Ca10(Si2O7)3Cl2 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BE.97 | Schlüterite-(Y) | (Y,REE)2AlSi2O7(OH)2F | Mon. 2/m : _P_21/b |
- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.