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Used as a functional filler, MicaFort high aspect ratio platy particles provide an excellent balance of mechanical, thermal and dimensional properties.

Your contact for 

Melissa Bartz

Inside sales / Sales coordination Americas
MicaFort, Muscovite Mica in hands

Special properties for our MicaFort range products are:

  • chemical inertness
  • hydrophilic nature
  • barrier-forming ability due to parallel particle alignment in matrices
  • high thermal stability (up to 1000°C)
  • elastic but tough particles
  • very low silica content for Phlogopite grades
  • excellent brightness and whiteness for Muscovite grades
  • high dielectric strength and electrical insulation properties.

LKAB Minerals exclusively source MicaFort from global strategic partners and our own high-quality mine in Finland. By using our extensive mineral processing knowledge we produce a broad portfolio of Phlogopite and Muscovite Mica products to be used in a variety of applications.

The main markets for LKAB Minerals' MicaFort are polymers, coatings, and construction. Please visit our industry uses section to find out more about how to use our products for your application.

MicaFort applications

  • car side panel, automotive parts,

    MicaFort in polymers

    MicaFort finds increasing use in thermoplastic compounds. It is used to replace glass-fibers in polyamide and to replace other mineral fillers in polypropylene.

    Other polymers benefitting from MicaFort's unique properties include PE, TPO, and PBT. Duroplastic polymers like polyester, polyurethane, epoxy, and acrylic can all gain enhanced performance and durability. Elastomeric systems show improved reinforcement and excellent mould release properties.

  • Rusty bridge - anti-corrosion coating with MicaFort

    MicaFort in coatings and construction

    Industrial coatings such as marine, anti-corrosive and chemical resistant paints benefit from the inert nature of MicaFort and its ability to form a barrier to aggressive chemicals. It is also used in the production of wall boards, cladding as well as joint compounds and plasters. Read more following the links to our industry uses pages.

MicaFort standard grades

  • Dry ground: PD900, PD200, MD500, MD250, MD150, MD100
  • Micronised: MM75, SCM-3W, SX300, SX400
  • Silane coated: PW80S, PW30S
  • Wet ground: PW80, PW30, R302, R120, R90, P66

MicaFort packaging

Our MicaFort product range is available in paper sacks or big bags. Some of our MicaFort grades are available in bulk, please contact your sales representative to find out if this applies to the grade you like to purchase.

Typical properties of MicaFort are as following:

Physical properties of MicaFort

Specific gravity [g/cm³] 2.8
Refractive index 1.58 – 1.6
Hardness (Mohs) 2 - 3
pH (ISO 787-9) 8 - 9

Chemical properties of MicaFort

Phlogopite Mica is a hydrated silicate of potassium and magnesium whereas Muscovite Mica a hydrated silicate of potassium and aluminium is.

MicaFort origin

Muscovite is a constituent of acid igneous rocks like granite, pegmatite or alaskite, some regionally metamorphosed rocks and clastic sedimentary rocks, ad is a product of alteration. Most commercial deposits are derived from pegmatites which contain 1-2% and rarely up to 10% muscovite. Mica is found in many regions of the world in the form of pegmatite rock and mica schist.

Phlogopite is associated with metamorphosed limestone and ultrabasic rocks, particularly hydrothermal veins formed through metasomatism of magnesium-rich rocks as well as ultrabasic and carbonatite ring intrusions associated with ancient shield areas. LKAB Minerals' Phlogopite Mica is sourced from a major deposit in Finland.

MicaFort toxicology

Phlogopite and Muscovite Mica are non-toxic natural minerals. For further information please download the Safety Data Sheets in the box on the right.


Interested in what Muscovite Mica can do for you?

Start by selecting your country to get the right contact person

My name is Melissa Bartz and I'm a Muscovite Mica product expert located in United States.

If you are interested in what this product can do for you, please give me a call or send me a message.

Office +1 312 439 7413
Mobile +1 312 513 5741

Call during business hours

08:00 AM - 17:00 PM

Local time in United States is 12:28 PM (UTC -5)

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