Beckettite
A valid IMA mineral species
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About Beckettite
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
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 for Standard |
|---|---|---|
| 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
Element Weights:
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.
inclusion (CAI) A-WP1 in USNM 7617; occurs in highly altered areas.
Associated Minerals at Type Locality:
Synonyms of Beckettite
Other Language Names for Beckettite
Dutch:Beckettiet
German:Beckettit
Relationship of Beckettite to other Species
Member of:
Other Members of Sapphirine Supergroup:
| 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] |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.HC. | Protocaseyite | [Al4(OH)6(H2O)12][V10O28] · 8H2O |
| 4.HC. | Ammoniolasalite | [(NH4)2Mg2(H2O)20] [V10O28] |
| 4.HC.05 | Pascoite | Ca2Ca(V10O28) · 17H2O |
| 4.HC.05 | Hydropascoite | Ca3(V10O28) · 24H2O |
| 4.HC.05 | Lasalite | Na2Mg2(V10O28) · 20H2O |
| 4.HC.05 | Hughesite | Na3Al(V10O28) · 22H2O |
| 4.HC.05 | Magnesiopascoite | Ca2Mg(V10O28) · 16H2O |
| 4.HC.05 | Rakovanite | (NH4)3Na3(V10O28) · 12H2O |
| 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
Localities for Beckettite
Showing 2 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Argentina | |
| Färber (n.d.) |
Mexico (TL) | |
| Mineralogical Magazine +3 other references |
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Allende meteorite, Pueblito de Allende, Chihuahua, Mexico