Name in honor of Addi Bischoff (b. 4 April 1955, Werdohl, Germany), cosmochemist at University of Münster, Germany, for his many contributions to research on mineralogy of carbonaceous chondrites, including CAIs in CH chondrites.

Type Locality:

ⓘ Acfer 214 meteorite, Foggaret Ezzaouia, In Salah District, In Salah Province, Algeria

The Al analogue of beckettite and warkite.

Chemically similar to brownmillerite, dmitryivanovite, grossite, hibonite, and krotite.

A new refractory phase formed in the solar nebula, most likely as a result of crystallization from an 16O-rich Ca, Al-rich melt under high-temperature (~1575 °C) and low-pressure (~10−4 to 10−5 bar) conditions in the CAI-forming region near the protosun, providing a new puzzle piece toward understanding the details of nebular processes (Ma et al. 2017).

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Unique IdentifiersHide

Mindat ID:

46547

Long-form identifier:

mindat:1:1:46547:0

GUID
(UUID V4):

68ed85f8-f9b9-4233-bb1b-5f2faf782002

IMA Classification of AddibischoffiteHide

IMA status:

Approved

Approval year:

2015

First published:

2017

Type description reference:

Ma, C., Krot, A.N., Nagashima, K. (2017) Addibischoffite, Ca2Al6Al6O20, a new calcium aluminate mineral from the Acfer 214 CH carbonaceous chondrite: A new refractory phase from the solar nebula. American Mineralogist: 102: 1556-1560.

Classification of AddibischoffiteHide

Strunz-mindat (2024):

4.BC.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
C : With medium-sized and large cations

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Add	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AddibischoffiteHide

Density:

3.41 g/cm³ (Calculated)

Chemistry of AddibischoffiteHide

Mindat Formula:

Ca₂Al₆Al₆O₂₀

Elements listed:

Al, Ca, O - search for minerals with similar chemistry

Crystallography of AddibischoffiteHide

Crystal System:

Triclinic

Class (H-M):

1 - Pinacoidal

Space Group:

Setting:

Cell Parameters:

a = 10.367 Å, b = 10.756 Å, c = 8.895 Å
α = 106°, β = 96°, γ = 124.7°

Ratio:

a:b:c = 0.964 : 1 : 0.827

Unit Cell V:

739.7 Å³

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.937 Å	(59)
2.683 Å	(66)
2.544 Å	(100)
2.541 Å	(78)
2.540 Å	(71)
2.104 Å	(78)
2.103 Å	(78)
2.089 Å	(83)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 1: Primary nebular phases	4.567-4.561
3 : Solar nebular condensates (CAIs, AOAs, URIs)	>4.565

Type Occurrence of AddibischoffiteHide

Type Locality:

ⓘ Acfer 214 meteorite, Foggaret Ezzaouia, In Salah District, In Salah Province, Algeria

General Appearance of Type Material:

Found in the core of a Ca-Al-rich inclusion (CAI) in the Acfer 214 CH3 carbonaceous chondrite

Place of Conservation of Type Material:

Type material is deposited in the G.J. Wasserburg Meteorite Collection (section Acfer 214-1580) of the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA

Empirical Formula of Type Material:

(Ca_2.00)(Al_2.55Mg_1.73V³⁺_1.08Ti³⁺_0.50Ca_0.09Fe²⁺_0.05)Σ_6.01(Al_4.14Si_1.86)O₂₀

Chemical Analysis of Type Material:

Al₂O₃	44.63 %
CaO	15.36 %
SiO₂	14.62 %
V₂O₃	10.64 %
MgO	9.13 %
Ti₂O₃	4.70 %
FeO	0.46 %
Total:	99.54 %

Geological Setting of Type Material:

CH3 carbonaceous chondrite

Associated Minerals at Type Locality:

Ti-kushiroite	Spinel	Perovskite	Melilite Group	Kushiroite
Hibonite	Anorthite

Reference:

Synonyms of AddibischoffiteHide

IMA2015-006

Relationship of Addibischoffite to other SpeciesHide

Member of:

Sapphirine Group > Sapphirine Supergroup

Other Members of this group:

Khmaralite	(Mg,Al,Fe)₁₆[(Al,Si,Be)₁₂O₃₆]O₄	Mon. 2/m : P2₁/b
Louisfuchsite	Ca₂(Mg₄Ti₂)(Al₄Si₂)O₂₀	Tric. 1 : P1
Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]	Mon. 2/m : P2₁/b
UM2002-52-SiO:AlFeMg	Mg₄(Mg_1.5Fe⁺²_0.3Fe⁺³_1.6Al_8.5)O₄[Si_1.7Al_10.3O₃₆]
Warkite	Ca₂Sc₆Al₆O₂₀	Tric. 1 : P1

Related Minerals - Strunz-mindat Grouping Hide

4.BC.	Ellinaite	CaCr₂O₄	Orth. mmm (2/m 2/m 2/m) : Pnma
4.BC.05	Marokite	CaMn³⁺₂O₄	Orth.
4.BC.5	Karlleuite	Ca₂MnO₄	Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
4.BC.10	Dmitryivanovite	CaAl₂O₄	Mon. 2/m : P2₁/b
4.BC.15	Warkite	Ca₂Sc₆Al₆O₂₀	Tric. 1 : P1
4.BC.25	Kudryavtsevaite	Na₃(Mg,Fe)(Fe,Ti)₂Ti₃O₁₂	Orth. mmm (2/m 2/m 2/m) : Pbcm
4.BC.30	Tululite	Ca₁₄(Fe³⁺,Al)(Al,Zn,Fe³⁺,Si,P,Mn,Mg)₁₅O₃₆	Iso. 2 3 : F2 3
4.BC.30	Valleyite	Ca₄Fe₆O₁₃	Iso. 4 3m : I4 3m
4.BC.35	Krotite	CaAl₂O₄	Mon. 2/m
4.BC.40	Bacaferrite	BaCaFe₄O₈	Trig. 3m (3 2/m) : P3 1m

Other InformationHide

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 AddibischoffiteHide

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https://www.mindat.org/min-46547.html
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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for AddibischoffiteHide

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

(2023) Addibischoffite. Handbook of Mineralogy. Mineralogical Society of America

Localities for AddibischoffiteHide

This 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.

Locality ListHide

- 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.

Algeria (TL)

In Salah Province

In Salah District

Foggaret Ezzaouia

ⓘ Acfer 214 meteorite (TL)

Mineralogical Magazine +2 other references

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Addibischoffite