Jacobsite

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Jacobsite
General
Chemical formula	iron(II,III) manganese oxide, MnFe₂O₄
Identification
Color	Black
Crystal habit	Disseminated to massive
Crystal system	Isometric Hexoctahedral
Cleavage	none
Fracture	Conchoidal
Mohs Scale hardness	5.5 - 6.0
Luster	Metallic
Refractive index	Opaque
Streak	reddish black
Specific gravity	4.75

Jacobsite is a manganese iron oxide mineral. It is a magnetite spinel.

It was first described in 1869 and named for the location of Jakobsberg, Sweden.

References

This article about a specific mineral or mineraloid is a stub. You can help Wikipedia by expanding it.

v • d • e

Manganese minerals

Borates

Sussexite · Tusionite

Carbonates

Ankerite · Kutnohorite · Rhodochrosite · Manganoan Calcite

Oxides

Simple	Manganite · Nsutite · Pyrolusite

Mixed	Birnessite · Bixbyite · Ferrocolumbite · Ferrotantalite · Galaxite · Glaucochroite · Hausmannite · Hübnerite · Jacobsite · Manganotantalite · Psilomelane · Romanèchite · Tantalite · Todorokite · Umber · Wolframite

Phosphates

Childrenite · Graftonite · Lithiophilite · Natrophilite · Purpurite · Triplite · Triploidite · Zanazziite

Silicates

Babingtonite · Bixbite · Braunite · Calderite · Chloritoid · Eudialyte · Jeffersonite · Knebelite · Ottrelite · Piemontite · Pyroxferroite · Rhodonite · Spessartine · Sugilite · Tephroite · Zakharovite · Zircophyllite

Sulfides

Alabandite · Hauerite · Rambergite

Other

Axinite (borosilicate) · Geigerite (arsenate) · Manganese nodule (various) · Zincobotryogen (sulfate)

Index Of Related Pages

All pages | Previous page (Jacob regnart) | Next page (Jacopo di Casentino)

Jacobsite	Jacobson	Jacobson's
Jacobson's Organ	Jacobson's Progressive Muscle Relaxation	Jacobson's cartilage
Jacobson's nerve	Jacobson's organ	Jacobson, MN
Jacobson, Minnesota	Jacobson-Bourbaki theorem	Jacobson-Morozov theorem
Jacobson (disambiguation)	Jacobson (surname)	Jacobson Density Theorem
Jacobson Stores	Jacobson density theorem	Jacobson epoxidation
Jacobson radical	Jacobson ring	Jacobson semisimple ring
Jacobson stores	Jacobson topology	Jacobson v. Massachusetts
Jacobson v. U.S.	Jacobson v. US	Jacobson v. United States
Jacobsonian organ	Jacobsons organ	Jacobson–Morozov theorem
Jacobstad	Jacobstads Wapen	Jacobstads wapen
Jacobstadt	Jacobsthal matrix	Jacobsthal number
Jacobsthal numbers	Jacobstow	Jacobstow, Cornwall
Jacobstowe	Jacobstowe, Devon	Jacobsville, MI
Jacobsville, Michigan	Jacobswell	Jacobswoude
Jacobsz Dirck	Jacobui jeongseok	Jacobus
Jacobus, PA	Jacobus, Pennsylvania	Jacobus Acontius
Jacobus Adriaan Gerhardus	Jacobus Almain Senonensis	Jacobus Almainus
Jacobus Arminius	Jacobus Balde	Jacobus Balduinus
Jacobus Baradaeus	Jacobus Barbireau	Jacobus Bartschius
Jacobus Bellamy	Jacobus Bongarsius	Jacobus Boshoff
Jacobus Capitein	Jacobus Clemens	Jacobus Clemens non Papa
Jacobus Clericus de Venetia	Jacobus Cornelius Kapteyn	Jacobus De Voragine
Jacobus Du Toit	Jacobus Duminy	Jacobus Elet
Jacobus Faber	Jacobus Faber Stapulensis	Jacobus Gallus
Jacobus Gideon Nel Strauss	Jacobus Gideon Strauss	Jacobus Golius
Jacobus Groenendaal	Jacobus Gronovius	Jacobus H. Kapteyn
Jacobus H. van't Hoff	Jacobus H. van 't Hoff	Jacobus Hendricus Van't Hoff
Jacobus Hendricus van't Hoff	Jacobus Hendricus van Lint	Jacobus Hendrik Pierneef
Jacobus Henricus Van't Hoff	Jacobus Henricus Van 't Hoff	Jacobus Henricus van't Hoff
Jacobus Henricus van 't Hoff	Jacobus Herculaas de la Rey	Jacobus Hercules De La Rey
Jacobus Hercules De la Rey	Jacobus Hercules de la Rey	Jacobus Hoff
Jacobus Hoogveld	Jacobus Houbraken	Jacobus J. Venter
Jacobus Johannes Fouche	Jacobus Johannes Fouché	Jacobus Johannes Pieter Oud
Jacobus Johannes Venter	Jacobus Johannes Wilhelmus van Wijck	Jacobus Kapteyn
Jacobus Kapteyn Telescope	Jacobus Latomus	Jacobus Le Grange
Jacobus Leodiensis	Jacobus Mazochius	Jacobus Mazzonius
Jacobus Menochius	Jacobus Metius	Jacobus Naveros
Jacobus Nicolaas Boshoff	Jacobus Oud	Jacobus Philippus Foresti da Bergamo
Jacobus Rudolph	Jacobus Sinapius	Jacobus Spoors
Jacobus Thomasius	Jacobus Tirinus	Jacobus Traicetensis
Jacobus Typotius	Jacobus Vaet	Jacobus Van Cortlandt
Jacobus Veneticus Graecus	Jacobus Veneticus Grecus	Jacobus Venter
Jacobus Verster	Jacobus Vide	Jacobus Weber
Jacobus Wimphelingus	Jacobus a Voragine	Jacobus arminius
Jacobus da Varagine	Jacobus de Bellovisu	Jacobus de Belvisius
Jacobus de Belviso	Jacobus de Bononia	Jacobus de Cessolis
Jacobus de Dacia	Jacobus de Kerle	Jacobus de Liege
Jacobus de Liège	Jacobus de Tepenec	Jacobus de Teramo
Jacobus de Varagine	Jacobus de Venetiis	Jacobus de Viterbio
Jacobus de Viterbo	Jacobus de Vitriaco	Jacobus de Voragine
Jacobus handl	Jacobus nel strauss	Jacobus of Viterbo
Jacobus of Voragine	Jacobus strauss	Jacobus van't Hoff
Jacobus van 't Hoff	Jacobus van Egmond	Jacobus van Looy
Jacobus van Meteren	Jacobus van Wijck	Jacobus vant Hoff
Jacoby	Jacoby's method	Jacoby (disambiguation)
Jacoby (surname)	Jacoby 2NT	Jacoby D. Dickens Center
Jacoby Ellsbury	Jacoby Glacier	Jacoby Jones
Jacoby McCabe Ellsbury	Jacoby Open Swiss Teams	Jacoby Shaddix
Jacoby Transfer	Jacoby Transfers	Jacoby Watkins
Jacoby ellsbury	Jacoby transfer	Jacoby transfers
Jacobyt	Jacobyte	Jacochów
Jacolliot	Jacom	Jacome Ratton
Jacome de Bruges	Jacomina van den Berg	Jacomino
Jacomo Barbarigo	Jacomo Brumel	Jacomo Brumello
Jacomo Brunel	Jacomo Brunello	Jacon dehan
Jacona	Jacona, Michoacan	Jacona, Michoacán
Jacona de Plancarte	Jacone Puligo	Jaconita
Jaconita, NM	Jaconita, New Mexico	Jacoona
Jacoona fabronia	Jacopetti	Jacopever
Jacopino	Jacopino da Tradate	Jacopino del Conte
Jacopo	Jacopo Aconcio	Jacopo Amigoni
Jacopo Avanzi	Jacopo Baccarini	Jacopo Balestri
Jacopo Bambini	Jacopo Barbarigo	Jacopo Barbaro
Jacopo Barbello	Jacopo Barozzi	Jacopo Barozzi da Vignola
Jacopo Barozzi detto il Vignola	Jacopo Bassano	Jacopo Bellini
Jacopo Berengario Da Carpi	Jacopo Berengario da Carpi	Jacopo Bertucci
Jacopo Boncompagni	Jacopo Bonfadio	Jacopo Boni
Jacopo Buonaparte	Jacopo Caldora	Jacopo Callot
Jacopo Cappucci	Jacopo Carrucci	Jacopo Carucci
Jacopo Cavedone	Jacopo Cavendone	Jacopo Celega
Jacopo Chiavistelli	Jacopo Chimenti	Jacopo Contarini
Jacopo Corsi	Jacopo Da Lentini	Jacopo Della Quercia
Jacopo Empoli	Jacopo Facciolati	Jacopo Ferretti
Jacopo Foresti	Jacopo Francesco, Count Riccati	Jacopo Francesco Riccati
Jacopo Gaddi	Jacopo Giachetti	Jacopo Gianninoto
Jacopo II Appiano	Jacopo II da Carrara	Jacopo IV Appiano
Jacopo IV d'Appiano	Jacopo I da Carrara	Jacopo Landino
Jacopo Ligozzi	Jacopo Marieschi	Jacopo Mazzoni
Jacopo Melani	Jacopo Nacchianti	Jacopo Nani
Jacopo Napoli	Jacopo Nardi	Jacopo Nigreti
Jacopo Pacchiarotti	Jacopo Pacchiarotto	Jacopo Palma
Jacopo Palma Giovane	Jacopo Palma the Younger	Jacopo Peri
Jacopo Peterman	Jacopo Piccolomini-Ammannati	Jacopo Poli
Jacopo Pontormo	Jacopo Ravasi	Jacopo Riccati
Jacopo Robusti	Jacopo Sadolet	Jacopo Sadoleto
Jacopo Saltarelli	Jacopo Salviati	Jacopo Sannazaro
Jacopo Sannazzaro	Jacopo Sansovino	Jacopo Sellaio
Jacopo Stefaneschi	Jacopo Tatti	Jacopo Tiepolo
Jacopo Tintoretto	Jacopo Torni	Jacopo Torriti
Jacopo Tunicelli	Jacopo V Appiano	Jacopo Vignali
Jacopo Vio	Jacopo Vrancqaert	Jacopo Zabarella
Jacopo Zabolini	Jacopo Zabolino	Jacopo Zucchi
Jacopo berengario da carpi	Jacopo carucci	Jacopo d'Antonio Tatti Sansovino
Jacopo d'Avanzi	Jacopo da Bassano	Jacopo da Bologna
Jacopo da Camerino	Jacopo da Carrara	Jacopo da Empoli
Jacopo da Palma il Giovane	Jacopo da Ponte	Jacopo da Ponte Bassano
Jacopo da Pontormo	Jacopo da Sellaio	Jacopo da Varagine
Jacopo da Varazze	Jacopo da Voragine	Jacopo da bologna
Jacopo de'Barbari	Jacopo de' Avanzi	Jacopo de' Barbari
Jacopo de' Barberi	Jacopo de Barbari	Jacopo de Barberi
Jacopo de Dondi	Jacopo de Voragine	Jacopo de Voragine, Blessed
Jacopo dei Barbari	Jacopo del Casentino	Jacopo del Conte
Jacopo del Duca	Jacopo del Sellaio	Jacopo dell'Indaco
Jacopo della Quercia	Jacopo della Quircia	Jacopo di Belviso

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