Johnsomervilleite
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About Johnsomervilleite
Formula:
Na10Ca6Mg18Fe25(PO4)36
Originally given as
{Ca}{Na6[ ]2}{Ca6Na2}{(Fe2+,Mg,Mn2+)43}(PO4)36
{Ca}{Na6[ ]2}{Ca6Na2}{(Fe2+,Mg,Mn2+)43}(PO4)36
Colour:
Dark brown
Lustre:
Sub-Vitreous, Resinous
Hardness:
4½
Specific Gravity:
3.35
Crystal System:
Trigonal
Member of:
Name:
Named in 1980 by A. Livingstone in memory of Mr John M. Somerville [1908-1978] who presented to the Royal Scottish Museum a specimen of garnet-quartz rock, which contained the new species.
Type Locality:
Classification of Johnsomervilleite
Approved
Approval Year:
1979
7/A.08-10
8.AC.50
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
Dana 7th ed.:
38.2.9.2
38.2.5.2
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
2 : (AB)5(XO4)3
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
2 : (AB)5(XO4)3
19.12.31
19 : Phosphates
12 : Phosphates of Mn
19 : Phosphates
12 : Phosphates of Mn
Physical Properties of Johnsomervilleite
Sub-Vitreous, Resinous
Colour:
Dark brown
Streak:
Light brown
Hardness:
4½ on Mohs scale
Cleavage:
Perfect
Probably {001}
Probably {001}
Fracture:
Conchoidal
Density:
3.35 g/cm3 (Measured) 3.41 g/cm3 (Calculated)
Optical Data of Johnsomervilleite
Type:
Uniaxial (+/-)
RI values:
nα = 1.655 nβ = 1.655
2V:
Measured: 10°
Max Birefringence:
δ = 1.655

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Comments:
Anomalously biaxial
Chemical Properties of Johnsomervilleite
Formula:
Na10Ca6Mg18Fe25(PO4)36
Originally given as
{Ca}{Na6[ ]2}{Ca6Na2}{(Fe2+,Mg,Mn2+)43}(PO4)36
Originally given as
{Ca}{Na6[ ]2}{Ca6Na2}{(Fe2+,Mg,Mn2+)43}(PO4)36
IMA Formula:
Na10Ca6Mg18Fe2+25(PO4)36
Crystallography of Johnsomervilleite
Crystal System:
Trigonal
Cell Parameters:
a = 15 Å, c = 42.75 Å
Ratio:
a:c = 1 : 2.85
Unit Cell V:
8,330.08 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Anhedral grains
Type Occurrence of Johnsomervilleite
Geological Setting of Type Material:
Granite pegmatite pods in kyanite-sillimanite gneiss
Associated Minerals at Type Locality:
Synonyms of Johnsomervilleite
Other Language Names for Johnsomervilleite
Relationship of Johnsomervilleite to other Species
Member of:
Other Members of this group:
Chladniite | {Ca}{Na8}{Ca4Na4}{(Mg,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
Fillowite | {Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
Galileiite | {Fe2+}{Na8}{Fe2+4Na4}{Fe2+43}(PO4)36 | Trig. 3 : R3 |
Stornesite-(Y) | {(Y, Ca)}{Na6◻2}{(Ca,Na)8}{(Mg,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
Xenophyllite | Na4Fe2+7(PO4)6 | Tric. 1 : P1 |
Common Associates
Albite | Na(AlSi3O8) |
Bermanite | Mn2+Mn3+2(PO4)2(OH)2 · 4H2O |
Hureaulite | (Mn,Fe)5(PO4)2(HPO4)2 · 4H2O |
Jahnsite | A generic name for a number of difficult to distinguish members in the |
Microcline | K(AlSi3O8) |
Phosphosiderite | FePO4 · 2H2O |
Quartz | SiO2 |
Tourmaline | A(D3)G6(T6O18)(BO3)3X3Z |
Tourmaline | A(D3)G6(T6O18)(BO3)3X3Z |
Triphylite | LiFe2+PO4 |
Vivianite | Fe2+3(PO4)2 · 8H2O |
Associated Minerals Based on Photo Data:
Jahnsite-(CaMnFe) | 3 photos of Johnsomervilleite associated with Jahnsite-(CaMnFe) on mindat.org. |
Phosphosiderite | 3 photos of Johnsomervilleite associated with Phosphosiderite on mindat.org. |
Vivianite | 3 photos of Johnsomervilleite associated with Vivianite on mindat.org. |
Related Minerals - Nickel-Strunz Grouping
8.AC. | Wopmayite | Ca6Na3□Mn(PO4)3(PO3OH)4 | Trig. 3m : R3c |
8.AC.05 | Howardevansite | NaCuFe2(VO4)3 | Tric. 1 : P1 |
8.AC.10 | Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 | Mon. |
8.AC.10 | Arseniopleite | (Ca,Na)NaMn2+(Mn2+,Mg,Fe2+)2(AsO4)3 | Mon. 2/m : P2/b |
8.AC.10 | Caryinite | (Na,Pb)(Ca,Na)CaMn2+2(AsO4)3 | Mon. 2/m |
8.AC.10 | Ferroalluaudite | (Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3 | |
8.AC.10 | Hagendorfite | NaCaMn2+Fe2+2(PO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Johillerite | Na(Mg,Zn)3Cu(AsO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Maghagendorfite | (□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3 | Mon. |
8.AC.10 | Nickenichite | Na0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Varulite | NaCaMn2+Mn2+2(PO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Ferrohagendorfite | NaCaFe2+Fe2+2(PO4)3 | Mon. |
8.AC.10 | Bradaczekite | NaCu4(AsO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Yazganite | NaFe3+2(Mg,Mn2+)(AsO4)3 · H2O | Mon. 2/m : B2/b |
8.AC.10 | Groatite | NaCaMn2(PO4)(HPO4)2 | Mon. 2/m : B2/b |
8.AC.15 | Bobfergusonite | Na2Mn5FeAl(PO4)6 | Mon. 2/m : P2/b |
8.AC.15 | Ferrowyllieite | (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 | Mon. 2/m : P21/b |
8.AC.15 | Qingheiite | NaMn3+Mg(Al,Fe3+)(PO4)3 | Mon. 2/m : P21/b |
8.AC.15 | Rosemaryite | (Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3 | Mon. 2/m : P21/b |
8.AC.15 | Wyllieite | (Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3 | Mon. 2/m |
8.AC.15 | Ferrorosemaryite | ◻NaFe2+Fe3+Al(PO4)3 | Mon. |
8.AC.15 | Qingheiite-(Fe2+) | Na2Fe2+MgAl(PO4)3 | Mon. 2/m : P21/m |
8.AC.18 | Manitobaite | Na16Mn2+ 25Al8(PO4)30 | Mon. m : Pb |
8.AC.20 | Marićite | NaFe2+(PO4) | Orth. mmm (2/m 2/m 2/m) : Pmna |
8.AC.25 | Berzeliite | (NaCa2)Mg2(AsO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
8.AC.25 | Manganberzeliite | NaCa2Mn2+2(AsO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
8.AC.25 | Palenzonaite | (Ca,Na)3CaMn2+2(VO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
8.AC.25 | Schäferite | Ca2NaMg2(VO4)3 | Iso. |
8.AC.30 | Brianite | Na2CaMg(PO4)2 | Mon. 2/m : P21/b |
8.AC.35 | Vitusite-(Ce) | Na3(Ce,La,Nd)(PO4)2 | Orth. mm2 : Pca21 |
8.AC.40 | Olgite | (Sr,Ba)(Na,Sr,REE)2Na(PO4)2 | Trig. 3m (3 2/m) : P3m1 |
8.AC.40 | Bario-olgite | (Ba,Sr)(Na,Sr,REE)2Na(PO4)2 · | Trig. 3 : P3 |
8.AC.45 | Strontiowhitlockite | Sr9Mg(PO4)6(HPO4) | Trig. 3m : R3c |
8.AC.45 | Whitlockite | Ca9Mg(PO4)6(HPO4) | Trig. 3m : R3c |
8.AC.45 | Merrillite | Ca9NaMg(PO4)7 | Trig. 3m : R3m |
8.AC.45 | Tuite | Ca3(PO4)2 | Trig. 3m (3 2/m) : R3m |
8.AC.45 | Ferromerrillite | Ca9NaFe2+(PO4)7 | Trig. 3m : R3c |
8.AC.50 | Chladniite | {Ca}{Na8}{Ca4Na4}{(Mg,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Fillowite | {Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Galileiite | {Fe2+}{Na8}{Fe2+4Na4}{Fe2+43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Stornesite-(Y) | {(Y, Ca)}{Na6◻2}{(Ca,Na)8}{(Mg,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Xenophyllite | Na4Fe2+7(PO4)6 | Tric. 1 : P1 |
8.AC.55 | Harrisonite | Ca(Fe2+,Mg)6(PO4)2(SiO4)2 | Trig. |
8.AC.60 | Kosnarite | KZr2(PO4)3 | Trig. 3m (3 2/m) : R3c |
8.AC.65 | Panethite | (Na,Ca)2(Mg,Fe2+)2(PO4)2 | Mon. 2/m : P21/b |
8.AC.70 | Stanfieldite | Ca4Mg5(PO4)6 | Mon. |
8.AC.75 | Ronneburgite | K2MnV4O12 | Mon. 2/m |
8.AC.80 | Tillmannsite | (Ag3Hg)(VO4,AsO4) | Tet. 4 : I4 |
8.AC.85 | Filatovite | K(Al,Zn)2(As,Si)2O8 | Mon. 2/m |
Related Minerals - Dana Grouping (8th Ed.)
38.2.5.1 | Fillowite | {Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
38.2.5.3 | Chladniite | {Ca}{Na8}{Ca4Na4}{(Mg,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
Related Minerals - Hey's Chemical Index of Minerals Grouping
19.12.1 | Metaswitzerite | Mn2+3(PO4)2 · 4H2O | Mon. 2/m : P2/b |
19.12.2 | Bermanite | Mn2+Mn3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : P2/b |
19.12.3 | Natrophilite | NaMn2+PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.4 | Sidorenkite | Na3Mn2+(CO3)(PO4) | Mon. |
19.12.5 | Niahite | (NH4)(Mn2+,Mg)(PO4) · H2O | Orth. mm2 : Pmn21 |
19.12.6 | Robertsite | Ca2Mn3+3(PO4)3O2 · 3H2O | Mon. m : Bb |
19.12.7 | Pararobertsite | Ca2Mn3+3(PO4)3O2 · 3H2O | Mon. 2/m : P21/b |
19.12.8 | Sinkankasite | Mn2+Al(PO3OH)2(OH) · 6H2O | Tric. |
19.12.9 | Mangangordonite | Mn2+Al2(PO4)2(OH)2 · 8H2O | Tric. |
19.12.10 | Heterosite | (Fe3+,Mn3+)PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.11 | Purpurite | (Mn3+,Fe3+)PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.12 | Wolfeite | (Fe2+,Mn2+)2(PO4)(OH) | Mon. 2/m : P21/b |
19.12.13 | Triploidite | (Mn2+,Fe2+)2(PO4)(OH) | Mon. 2/m : P2/b |
19.12.14 | Lipscombite | Fe2+Fe3+2(PO4)2(OH)2 | Tet. |
19.12.15 | Frondelite | Mn2+Fe3+4(PO4)3(OH)5 | Orth. 2 2 2 : C2 2 21 |
19.12.16 | Rockbridgeite | Fe2+Fe3+4(PO4)3(OH)5 | Orth. mmm (2/m 2/m 2/m) |
19.12.17 | Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 | Orth. |
19.12.18 | Landesite | Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O | Orth. |
19.12.19 | Phosphoferrite | (Fe2+,Mn2+)3(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.20 | Reddingite | (Mn2+,Fe2+)3(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.21 | Earlshannonite | Mn2+Fe3+2(PO4)2(OH)2 · 4H2O | Mon. |
19.12.22 | Hureaulite | (Mn,Fe)5(PO4)2(HPO4)2 · 4H2O | Mon. 2/m : B2/b |
19.12.23 | Switzerite | Mn2+3(PO4)2 · 7H2O | Mon. |
19.12.24 | Laueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : P1 |
19.12.25 | Pseudolaueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Mon. 2/m : P21/b |
19.12.26 | Strunzite | Mn2+Fe3+2(PO4)2(OH)2 · 6H2O | Tric. 1 : P1 |
19.12.27 | Stewartite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : P1 |
19.12.28 | Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 | Mon. |
19.12.29 | Ferroalluaudite | (Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3 | |
19.12.30 | Fillowite | {Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
19.12.32 | Wicksite | NaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2O | Orth. mmm (2/m 2/m 2/m) |
19.12.33 | Dickinsonite-(KMnNa) | {KNa}{Mn2+◻}{Ca}{Na3}{Mn2+13}{Al}(PO4)12(OH)2 | Mon. 2/m : B2/b |
19.12.34 | Sarcopside | (Fe2+,Mn2+,Mg)3(PO4)2 | Mon. 2/m : P21/b |
19.12.35 | Ludlamite | Fe2+3(PO4)2 · 4H2O | Mon. 2/m : P21/b |
19.12.36 | Graftonite | Fe2+Fe2+2(PO4)2 | Mon. 2/m : P21/b |
19.12.37 | Wilhelmvierlingite | CaMnFe3+(PO4)2(OH) · 2H2O | Orth. |
19.12.38 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O | Tric. 1 : P1 |
19.12.39 | Beusite | Mn2+Mn2+2 (PO4)2 | Mon. |
19.12.40 | Messelite | Ca2Fe2+(PO4)2 · 2H2O | Tric. 1 : P1 |
19.12.41 | Jahnsite-(CaMnFe) | {Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
19.12.42 | Jahnsite-(CaMnMn) | {Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
19.12.43 | Jahnsite-(CaMnMg) | {Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
19.12.44 | Keckite | CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2O | Mon. 2/m : P2/b |
19.12.45 | Stanfieldite | Ca4Mg5(PO4)6 | Mon. |
19.12.46 | Laubmannite | (Fe2+,Mn2+,Ca)3Fe3+6(PO4)4(OH)12 | |
19.12.47 | Zodacite | Ca4Mn2+Fe3+4(PO4)6(OH)4 · 12H2O | Mon. |
19.12.48 | Hagendorfite | NaCaMn2+Fe2+2(PO4)3 | Mon. 2/m : B2/b |
19.12.49 | Maghagendorfite | (□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3 | Mon. |
19.12.50 | Varulite | NaCaMn2+Mn2+2(PO4)3 | Mon. 2/m : B2/b |
19.12.51 | Griphite | Na4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8 | Iso. m3 (2/m 3) |
19.12.52 | Attakolite | (Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4 | Mon. 2/m : B2/m |
19.12.53 | Arrojadite-(KFe) | {KNa}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2 | Mon. |
19.12.54 | Lun'okite | (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
19.12.55 | Eosphorite | Mn2+Al(PO4)(OH)2 · H2O | Orth. mmm (2/m 2/m 2/m) : Cmca |
19.12.56 | Ernstite | (Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O | Mon. |
19.12.57 | Childrenite | Fe2+Al(PO4)(OH)2 · H2O | Orth. mm2 : Ccc2 |
19.12.58 | Bobfergusonite | Na2Mn5FeAl(PO4)6 | Mon. 2/m : P2/b |
19.12.59 | Qingheiite | NaMn3+Mg(Al,Fe3+)(PO4)3 | Mon. 2/m : P21/b |
19.12.60 | Whiteite-(CaFeMg) | {Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P21/b |
19.12.61 | Whiteite-(CaMnMg) | {Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m |
19.12.62 | Whiteite-(MnFeMg) | {(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P21/b |
19.12.63 | Rittmannite | {(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O | Mon. |
19.12.64 | Zanazziite | Ca2Mg5Be4(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/b |
19.12.65 | Samuelsonite | (Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2 | Mon. 2/m : B2/m |
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 Johnsomervilleite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1981): 66: 437.
Mineralogical Magazine (1980): 43: 833-836.
Anais da Academia brasileira de Ciencias 57(3): 325-337.
Internet Links for Johnsomervilleite
mindat.org URL:
https://www.mindat.org/min-2107.html
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External Links:
Mineral Dealers:
Specimens:
The following Johnsomervilleite specimens are currently listed for sale on minfind.com.
Localities for Johnsomervilleite
Locality List




All localities listed without proper references should be considered as questionable.
Argentina | |
| Abstracts of the Lunar and Planetary Science Conference, volume 21, page 258, (1990) |
Brazil | |
| Cassedanne, J.P. & Baptista, A. (1999): Famous Mineral Localities: The Sapucaia Pegmatite Minas Gerais, Brazil. Mineralogical Record, 30: 347-360 + 365 |
Canada | |
| The Canadian Mineralogist Vol. 36,pp. 367-376 (1998) |
Finland | |
| Ilkka Mikkola collection, XRD+EPMA |
Mexico | |
| Meteoritics 28:415 (July, 1993) |
Rwanda | |
| The Canadian Mineralogist Vol. 36,pp. 355-366 (1998) |
Spain | |
| Roda, E., Fontán, F., Pesquera, A., & Keller, P. (2001). Phosphate mineral associations of the Aldehuela de la Bóveda, Li-Sn-Nb+-Tb bearing pegmatite, Salamanca, Spain: . In Mineral Deposits at the Beginning of the 21 st Century. Proceedings of the Joint sixth Biennial SGA-SEG Meeting (pp. 477-480). |
| American Mineralogist 89:110-125 (2004); Encarnación Roda-Robles, Alfonso Pesquera (2007) Locality no. 4: The Phosphates-Rich Cañada Pegmatite (Aldehuela de La Bóveda, Salamanca, Spain) in ALEXANDRE LIMA & ENCARNACIÓN RODA ROBLES ed (2007) GRANITIC PEGMATITES: THE STATE OF THE ART - FIELD TRIP GUIDEBOOK. MEMÓRIAS N. º 9, UNIV. DO PORTO, FACULDADE DE CIÊNCIAS, DEPARTAMENTO DE GEOLOGIA pp 67-72. |
UK (TL) | |
| Livingstone, A. (1980) Johnsomervilleite, a New Transition-Metal Phosphate Mineral from the Loch Quoich Area, Scotland. Mineralogical Magazine, vol. 43, n° 331, p. 833-836.; Livingstone, A. and Macpherson, H.G. (1983) Fifth supplementary list of British minerals (Scottish). Mineralogical Magazine, vol. 47, n° 342, p. 99-105. |
USA | |
| Meteoritics 28:415 (July, 1993) |
| Meteoritics, vol. 28, no. 3, volume 28, page 415 |
Sapucaia mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil