Ferriakasakaite-(La)
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Masahide Akasaka
Formula:
{CaLa}{Fe3+AlMn2+}(Si2O7)(SiO4)O(OH)
Crystal System:
Monoclinic
Member of:
Name:
Named in 2014 by Mariko Nagashima, D. Nishio-Hamane, N. Tomita, T. Minakawa, and S. Inaba in honor of Masahide Akasaka (b. 1950), professor at Shimane University, Japan, for "his outstanding contributions to mineralogy, especially to the study of rock-forming minerals occurring in Mn–Fe ore deposits and the natural and synthetic epidote-supergroup minerals." The name include a prefix and a suffix indicating constituent elements according to the epidote-supergroup nomenclature.
Allanite Group of the Epidote Supergroup. Ferriakasakaite-(La) has a new combination of dominant cations at A1(Ca) and M3(Mn2+), which are the key sites to determine a root name for epidote-supergroup minerals.
Classification of Ferriakasakaite-(La)
Approved
Approval Year:
2013
First Published:
2015
Chemical Properties of Ferriakasakaite-(La)
Formula:
{CaLa}{Fe3+AlMn2+}(Si2O7)(SiO4)O(OH)
IMA Formula:
CaLaFe3+AlMn2+(Si2O7)(SiO4)O(OH)
Idealised Formula:
A1CaA2LaM1Fe3+M2AlM3Mn2+(SiO4)(Si2O7)O(OH)
Crystallography of Ferriakasakaite-(La)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 8.8733(2) Å, b = 5.7415(1) Å, c = 10.0805(3) Å
β = 113.845(2)°
β = 113.845(2)°
Ratio:
a:b:c = 1.545 : 1 : 1.756
Unit Cell V:
469.73 ų
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.220 | (26) |
| 3.509 | (47) |
| 2.899 | (100) |
| 2.871 | (40) |
| 2.710 | (35) |
| 2.706 | (35) |
| 2.614 | (53) |
| 2.573 | (26) |
Comments:
From Type Description.
Type Occurrence of Ferriakasakaite-(La)
Place of Conservation of Type Material:
Type material is deposited in the collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen number NSM M-43919
Geological Setting of Type Material:
In tephroite ± calcite veinlets cutting a stratiform ferromanganese deposit.
Associated Minerals at Type Locality:
Synonyms of Ferriakasakaite-(La)
Other Language Names for Ferriakasakaite-(La)
Japanese:ランタンフェリ赤坂石
Relationship of Ferriakasakaite-(La) to other Species
Member of:
Other Members of this group:
| Allanite-(Ce) | {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH) |
| Allanite-(La) | {CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH) |
| Allanite-(Nd) | {CaNd}{Al2Fe2+}(Si2O7)(SiO4)O(OH) |
| Allanite-(Y) | {CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH) |
| Androsite-(Ce) | {Mn2+REE}{AlAlMn2+}(SiO4)(Si2O7)O(OH) |
| Dissakisite-(Ce) | {CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH) |
| Dissakisite-(La) | {CaLa}{Al2Mg}(Si2O7)(SiO4)O(OH) |
| Ferriallanite-(Ce) | {CaCe}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH) |
| Ferriallanite-(La) | {CaLa}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH) |
| Ferriandrosite-(Ce) | {Mn2+REE}{Fe3+AlMn2+}(SiO4)(Si2O7)O(OH) |
| Ferriandrosite-(La) | {MnLa}{Fe3+AlMn2+}(Si2O7)(SiO4)O(OH) |
| Manganiandrosite-(Ce) | {Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH) |
| Manganiandrosite-(La) | {Mn2+La}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH) |
| Uedaite-(Ce) | {Mn2+Ce}{Al2Fe2+}(Si2O7)(SiO4)O(OH) |
| UM1989-32-SiO:AlCaFeHREE | (Ca0.5□0.5)(Ce,La,Nd)Fe3+Al2(Si2O7)(SiO4)O(OH) |
| Unnamed (Ce- and Mn-analogue of Ferriakasakaite-(La)) | {Ca,(Ce,La,Nd),Mn2+}2(Mn3+,Fe3+,Al)Al(Mn2+,Mg)(Si2O7)(SiO4)O(OH) |
| Unnamed (Mg-analogue of Ferriallanite-(Ce)) | {CaCe}{(Fe3+,Al)Al(Mg,Fe2+)}(Si2O7)(SiO4)O(OH) |
| Unnamed (Mn-analogue of Ferriakasakaite-(La)) | {CaLa}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH) |
| Unnamed (Mn-analogue of Ferriallanite-(Ce)) | {CaCe}{Fe3+AlMn2+}(Si2O7)(SiO4)O(OH) |
| Vanadoallanite-(La) | {CaLa}{V3+AlFe2+}(Si2O7)(SiO4)O(OH) |
| Vanadoandrosite-(Ce) | {Mn2+Ce}{V3+AlMn2+}(Si2O7)(SiO4)O(OH) |
Common Associates
Associated Minerals Based on Photo Data:
| Ferriandrosite-(La) | 3 photos of Ferriakasakaite-(La) associated with Ferriandrosite-(La) on mindat.org. |
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 Ferriakasakaite-(La)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Nagashima, M., Nishio-Hamane, D., Tomita, N., Minakawa, T., Inaba, S. (2014) Ferriakasakaite-(La), IMA 2013-126. CNMNC Newsletter No. 20, June 2014, page 551. Mineralogical Magazine: 78: 549-558.
Nagashima, M., Nishio-Hamane, D., Tomita, N., Minakawa, T., Inaba, S. (2015) Ferriakasakaite-(La) and ferriandrosite-(La): new epidote-supergroup minerals from Ise, Mie Prefecture, Japan. Mineralogical Magazine: 79: 735-753.
Internet Links for Ferriakasakaite-(La)
mindat.org URL:
https://www.mindat.org/min-45983.html
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Localities for Ferriakasakaite-(La)
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
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(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Germany | |
| in the collection of Christof Schäfer |
Japan (TL) | |
| Nagashima, M., Nishio-Hamane, D., Tomita, N., Minakawa, T. and Inaba, S. (2014) Ferriakasakaite-(La), IMA 2013-126. CNMNC Newsletter No. 20, June 2014, page 551; Mineralogical Magazine, 78, 549-558.; Nagashima, M., Nishio-Hamane, D., Tomita, N., Minakawa, T., Inaba, S. (2015): Ferriakasakaite-(La) and ferriandrosite-(La): new epidote-supergroup minerals from Ise, Mie Prefecture, Japan. Mineralogical Magazine, 79, 735-753. |
USA | |
| Heixong Yang |
Unnamed manganese deposit, Shobu, Ise City, Mie Prefecture, Kinki region, Honshu Island, Japan