Beckettite
A valid IMA mineral species
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Formula:
Ca2V6Al6O20
the general formula is Ca2(V,Al,Ti,Mg)6Al6O20
Crystal System:
Triclinic
Member of:
Name:
Named in honor of John R. Beckett, a cosmochemist at California Institute of Technology.
Type Locality:
The V3+ analogue of addibischoffite and warkite.
Chemically similar to sherwoodite (both Ca-Al-V minerals, but different V valency); somewhat similar to burnettite, mukhinite, kannanite.
It is a primary, high-temperature species, formed due to igneous crystallization of an 16O- and V-rich CAI (Calcium-Aluminium-Inclusion) melt.
Chemically similar to sherwoodite (both Ca-Al-V minerals, but different V valency); somewhat similar to burnettite, mukhinite, kannanite.
It is a primary, high-temperature species, formed due to igneous crystallization of an 16O- and V-rich CAI (Calcium-Aluminium-Inclusion) melt.
Unique Identifiers
Mindat ID:
46545
Long-form identifier:
mindat:1:1:46545:2
GUID
(UUID V4):
(UUID V4):
c34931b3-a77c-4aad-9a7c-7d208ea5b0b3
IMA Classification of Beckettite
Classification of Beckettite
4.HC.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Bek | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Beckettite
Mindat Formula:
Ca2V6Al6O20
the general formula is Ca2(V,Al,Ti,Mg)6Al6O20
the general formula is Ca2(V,Al,Ti,Mg)6Al6O20
Elements listed:
Crystallography of Beckettite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 10.367 Å, b = 10.756 Å, c = 8.895 Å
α = 106°, β = 96°, γ = 124.7°
α = 106°, β = 96°, γ = 124.7°
Ratio:
a:b:c = 0.964 : 1 : 0.827
Unit Cell V:
739.73 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.684 Å | (60) |
2.683 Å | (68) |
2.544 Å | (100) |
2.541 Å | (81) |
2.540 Å | (75) |
2.104 Å | (84) |
2.103 Å | (84) |
2.089 Å | (89) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
6 : Secondary asteroid phases | 4.566-4.560 |
Type Occurrence of Beckettite
General Appearance of Type Material:
Aggregates of crystals 4 to 8 μm.
Place of Conservation of Type Material:
In the collections of the National Museum of Natural History,Smithsonian Institution, Washington, DC, USA, registration number USNM 7617.
Geological Setting of Type Material:
CV3 meteorite in a V-rich, fluffy Type A Ca-Al-rich
inclusion (CAI) A-WP1 in USNM 7617; occurs in highly altered areas.
Associated Minerals at Type Locality:
Synonyms of Beckettite
Relationship of Beckettite to other Species
Member of:
Other Members of this group:
Aenigmatite Group | A subgroup of the Sapphirine Supergroup. | |
Devilliersite | Ca4Ca2Fe3+10O4[(Fe3+10Si2)O36] | Tric. 1 : P1 |
Khesinite | Ca4(Mg3Fe3+9)O4(Fe3+9Si3)O36 | Tric. 1 : P1 |
Rhönite Group | Subgroup of the Sapphirine Supergroup. | |
Sapphirine Group | Subgroup of the Sapphirine Supergroup. | |
Surinamite | (Mg,Fe)3Al4BeSi3O16 | Mon. 2/m |
UM1988-26-SiO:AlMg | Mg4Al2O[Si3Al2O15] |
Related Minerals - Strunz-mindat Grouping
4.HC. | Ammoniolasalite | (NH4)2Mg2(H2O)20] [V10O28] |
4.HC. | Protocaseyite | [Al4(OH)6(H2O)12][V10O28] · 8H2O |
4.HC.05 | Pascoite | Ca2Ca(V10O28) · 17H2O |
4.HC.05 | Lasalite | Na2Mg2(V10O28) · 20H2O |
4.HC.05 | Magnesiopascoite | Ca2Mg(V10O28) · 16H2O |
4.HC.05 | Rakovanite | (NH4)3Na3(V10O28) · 12H2O |
4.HC.05 | Hughesite | Na3Al(V10O28) · 22H2O |
4.HC.05 | Hydropascoite | Ca3(V10O28) · 24H2O |
4.HC.10 | Hummerite | K2Mg2(V10O28) · 16H2O |
4.HC.15 | Sherwoodite | Ca5.5(AlV4+V5+12O39) · 28H2O |
4.HC.20 | Bluestreakite | K4Mg2(V4+2V5+8O28) · 14H2O |
4.HC.25 | Wernerbaurite | {(NH4)2[Ca2(H2O)14](H2O)2}{V10O28} |
4.HC.25 | Burroite | Ca2(NH4)2(V10O28) · 15H2O |
4.HC.30 | Caseyite | [(V5+O2)Al10-x(OH)20-2x(H2O)18-2x]2[H2V4+V5+9O28][V5+10O28]2(Na,K,Ca)2-y(SO4)2-z · (60+8x+y+4z)H2O (x = 0-2.5; y = 0-2; z = 0-2) |
4.HC.35 | Gunterite | Na4Ca(V10O28) · 20H2O |
4.HC.40 | Kokinosite | Na2Ca2(V10O28) · 24H2O |
4.HC.45 | Nashite | Na3Ca2[(V5+9V4+)O28] · 24H2O |
4.HC.50 | Okieite | Mg3[V10O28] · 28H2O |
4.HC.55 | Postite | Mg(H2O)6Al2(OH)2(H2O)8(V10O28) · 13H2O |
4.HC.60 | Schindlerite | {(NH4)4Na2(H2O)10}{V10O28} |
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.
Internet Links for Beckettite
mindat.org URL:
https://www.mindat.org/min-46545.html
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References for Beckettite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015, CNMNC Newsletter No 25. Mineralogical Magazine, 79 (3) 529-535 doi:10.1180/minmag.2015.079.3.02
Localities for Beckettite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Argentina | |
| Färber (n.d.) |
Mexico (TL) | |
| Mineralogical Magazine +3 other references |